The Secret of the Cave Treasure

Message to Mattel Creations: Please make this into an actual movie if it does happen.

The Secret of the Cave Treasure is a 2021 Thomas & Friends movie.

Plot
When Thomas finds an old mine exit, his news becomes spreadable to his love interest, Ashima and all of his friends. Because of that, Ashima and all of Thomas' friends make Thomas feel even prouder than he was before. But, Diesel makes a plan to make Thomas feel silly by giving him no coal and water. But, his plan backfires when he destroys Percy's new trucks which makes Percy feel very upset. So, Thomas goes on a mission to find something better than Percy's new trucks. But he gets himself trapped in an old abandoned mine and find themselves on a raging river on a raft. So all of Thomas's friends, including Nia, Dory, Marlin, Nemo, Pingu, the Teletubbies and Noo-Noo, The Ice Age, Oh, Tip, the MerseyGirls and Ant & Dec and his love interest, Ashima try to find them before Thomas is lost forever.

Characters

 * Thomas
 * Edward
 * Henry
 * Gordon
 * James
 * Percy
 * Toby
 * Duck
 * Donald and Douglas
 * Oliver
 * Bill and Ben
 * Flying Scotsman
 * Harvey
 * Emily
 * Spencer
 * Rosie
 * Stanley
 * Flora
 * Belle
 * Stephen
 * Porter
 * Gator
 * Samson
 * Glynn
 * Ryan
 * Ashima
 * Nia
 * Rebecca
 * Diesel
 * Daisy
 * Diesel 10
 * Salty
 * Iron' Arry and Iron' Bert
 * Den
 * Dart
 * Paxton
 * Sidney
 * Norman
 * Philip
 * Hugo
 * Flynn
 * Marion
 * Skiff
 * Skarloey
 * Sir Handel
 * Peter Sam
 * Duncan
 * Victor
 * Luke
 * Millie
 * Rex
 * Bert
 * Mike
 * Annie and Clarabel
 * Henrietta
 * Toad
 * Judy and Jerome
 * Bradford
 * Hannah
 * Terence
 * Bertie
 * Trevor
 * Harold
 * Bulgy
 * Jack
 * Alfie
 * Oliver the Excavator
 * Max and Monty
 * Kevin
 * Cranky
 * Carly
 * Big Mickey
 * The Fat Controller
 * Kettlewell
 * Whiff (cameo)
 * Charlie (cameo)
 * Connor (cameo)
 * Caitlin (cameo)
 * Mavis (cameo)
 * Stafford (cameo)
 * Winston (cameo)
 * Rusty (cameo)
 * Slip Coaches (cameo)

Characters Introduced

 * Charlotte
 * Lightning McQueen
 * Mater
 * Sally Carrera
 * Luigi
 * Guido
 * Dory
 * Marlin
 * Nemo
 * Pingu
 * Tinky Winky
 * Dipsy
 * Laa-Laa
 * Po
 * Noo-Noo
 * Lincoln Loud
 * Lori Loud
 * Leni Loud
 * Luna Loud
 * Luan Loud
 * Lucy Loud
 * Woody
 * Buzz Lightyear
 * Jessie
 * Manny
 * Sid
 * Diego
 * Scrat
 * Oh
 * Tip
 * Ant & Dec
 * Stephen Mulhern
 * Basil Brush
 * Julia (MerseyGirls)
 * Alice (MerseyGirls)
 * Becky (MerseyGirls)
 * Kate (MerseyGirls)
 * Fey (MerseyGirls)
 * Annie (MerseyGirls)
 * Emily (MerseyGirls)
 * Chelsea (MerseyGirls)
 * Bullseye (does not speak)
 * Mr. Potato Head (does not speak)
 * Mrs. Potato Head (does not speak)
 * Rex (does not speak)
 * Hamm (does not speak)
 * Slinky Dog (does not speak)
 * The Three Aliens (do not speak)
 * Trixie (does not speak)
 * Buttercup (does not speak)
 * Mr. Pricklepants (does not speak)
 * Peas in a Pod (do not speak)
 * Totoro (does not speak)
 * Destiny (mentioned)
 * Pig (cameo)

Celebrity cameos in CGI

 * Harry Hill
 * Dermot O'Leary
 * Olly Murs
 * Caroline Flack
 * Ashley Roberts
 * Scarlett Moffatt
 * Louisa Johnson
 * Mark Hamill
 * Vernon Kay
 * David Walliams
 * Alesha Dixon
 * Amanda Holden
 * Simon Cowell
 * Paddy McGuinness
 * Freddie Flintoff
 * Chris Harris

UK, AUS and NZ

 * Pierce Brosnan as The Narrator
 * John Hasler as Thomas
 * Keith Wickham as Edward, Henry, Gordon, Salty, Den, Norman, Glynn, Bert and The Fat Controller
 * Rob Rackstraw as James, Toby, Donald, Hugo, Bradford and Big Mickey
 * Nigel Pilkington as Percy and Trevor
 * Teresa Gallagher as Emily, Judy, Annie and Clarabel
 * Steve Kynman as Duck, Porter and Paxton
 * Joe Mills as Douglas, Oliver and Toad
 * Matt Wilkinson as Cranky, Diesel 10, Stanley and Kevin
 * Tom Stourton as Rex and Terence
 * Tim Whitnall as Mike and Jerome
 * Kerry Shale as Diesel, Iron' Arry and Iron' Bert
 * Bob Golding as Sidney and Stephen
 * Miranda Raison as Millie
 * Nicola Stapleton as Rosie
 * David Bedella as Victor
 * Maggie Ollerenshaw as Henrietta
 * Clive Mantle as Gator
 * Rasmus Hardiker as Philip
 * Tina Desai as Ashima
 * Yvonne Grundy as Nia
 * Rachel Miller as Rebecca
 * Colin McFarline as Bulgy
 * Christopher Ragland as Percy's Trucks
 * Lucy Montgomery as Carly and Hannah
 * Ellen DeGeneres as Dory
 * Albert Brooks as Marlin
 * Hayden Rolance as Nemo
 * Keith Furguson as Lightning McQueen
 * Larry the Cable Guy as Mater
 * Bonnie Hunt as Sally
 * Tony Shalhoulb as Luigi
 * Guido Quaroni as Guido
 * Dave Thompson as Tinky Winky
 * John Simmit as Dipsy
 * Nikky Smedly as Laa-Laa
 * Pui Fan Lee as Po
 * Emily Mortimer as Flora
 * Tom Hanks as Woody
 * Tim Allen as Buzz Lightyear
 * Joan Cussack as Jessie
 * Ray Romano as Manny
 * John Jeguizamo as Sid
 * Denis Leary as Diego
 * Jim Parsons as Oh
 * Rihanna as Tip
 * Sabine Schmitz as Charlotte
 * Anthony McPartlin as Ant
 * Declan Donnelly as Dec
 * Stephen Mulhern as Himself
 * Julia Charlie as Julia
 * Alice Carlile as Alice
 * Becky Jordan as Becky
 * Annie Winstanley as Annie
 * Emily Chapman as Herself
 * Fey...... as Fey
 * Kate Charlie as Kate
 * Chelsea Evans as Chelsea
 * Basil Brush as Himself
 * William Hope as Miner 1
 * Chris Wedge as Miner 2 and Scrat

US and CAN

 * Pierce Brosnan as The Narrator
 * Joseph May as Thomas
 * William Hope as Edward, Toby and Miner 1
 * Kerry Shale as Henry, Gordon, Kevin, Diesel, Iron' Arry and Iron' Bert
 * Rob Rackstraw as James, Stanley, Donald, Hugo, Bradford and Big Mickey
 * Christopher Ragland as Percy, Trevor and Percy's Trucks
 * Jules de Jongh as Emily
 * Keith Wickham as Salty, Den, Norman, Glynn, Bert and The Fat Controller
 * Teresa Gallagher as Judy, Annie and Clarabel
 * David Menkin as Porter
 * Steve Kynman as Duck and Paxton
 * Joe Mills as Douglas, Oliver and Toad
 * Matt Wilkinson as Diesel 10
 * Glenn Wrage as Cranky
 * Tom Stourton as Rex and Terence
 * Tim Whitnall as Mike and Jerome
 * Bob Golding as Sidney and Stephen
 * Miranda Raison as Millie
 * Nicola Stapleton as Rosie
 * David Bedella as Victor
 * Maggie Ollerenshaw as Henrietta
 * Clive Mantle as Gator
 * Rasmus Hardiker as Philip
 * Tina Desai as Ashima
 * Yvonne Grundy as Nia
 * Rachel Miller as Rebecca
 * Colin McFarline as Bulgy
 * Christopher Ragland as Percy's Trucks
 * Lucy Montgomery as Carly and Hannah
 * Ellen DeGeneres as Dory
 * Albert Brooks as Marlin
 * Hayden Rolance as Nemo
 * Keith Furguson as Lightning McQueen
 * Larry the Cable Guy as Mater
 * Bonnie Hunt as Sally
 * Tony Shalhoulb as Luigi
 * Guido Quaroni as Guido
 * Dave Thompson as Tinky Winky
 * John Simmit as Dipsy
 * Nikky Smedly as Laa-Laa
 * Pui Fan Lee as Po
 * Emily Mortimer as Flora
 * Tom Hanks as Woody
 * Tim Allen as Buzz Lightyear
 * Joan Cussack as Jessie
 * Ray Romano as Manny
 * John Jeguizamo as Sid
 * Denis Leary as Diego
 * Jim Parsons as Oh
 * Rihanna as Tip
 * Sabine Schmitz as Charlotte
 * Anthony McPartlin as Ant
 * Declan Donnelly as Dec
 * Stephen Mulhern as Himself
 * Julia Charlie as Julia
 * Alice Carlile as Alice
 * Becky Jordan as Becky
 * Annie Winstanley as Annie
 * Emily Chapman as Herself
 * Fey...... as Fey
 * Kate Charlie as Kate
 * Chelsea Evans as Chelsea
 * Basil Brush as Himself
 * Chris Wedge as Miner 2 and Scrat

Songs

 * Troublesome Trucks (The Adventure Begins version)
 * Really Useful Engine (The Adventure Begins version)
 * Alive
 * The Other Side (bonus features only)
 * Fight Song (bonus features only)
 * Thomas & Friends tune (2004-2014; soundtrack only)
 * The Pingu Dance (soundtrack only)
 * Teletubbies Say Eh-Oh! (soundtrack only)
 * Collision of Worlds (soundtrack only)
 * Beyond the Sea (soundtrack only)
 * You've Got a Friend in Me (soundtrack only)
 * Feel the Light (soundtrack only)
 * Saturday Night Takeaway (2013-present; soundtrack only)
 * Britain's Got Talent tune (2012-present; soundtrack only)
 * I'm a Celebrity... Get Me Out of Here! tune (soundtrack only)

Trivia

 * On the premiere date of the film in the UK, Ant & Dec opened the film at all cinemas nationwide.
 * The movie only has one completely new characters. The rest of the new characters are ones that we have seen but are new to the Thomas & Friends universe.
 * The movie was originally planned for a release date of August 20th 2020. But due to the coronavirus pandemic and the death of Caroline Flack on February 15th 2020 and former narrator Michael Angelis on May 28th 2020, it was pushed back to September 19th 2021.
 * In one of the scenes in the film, someone is driving The Overtaker from Top Gear.
 * Audio from Sodor's Legend of the Lost Treasure is used when Thomas falls into the giant hole that Scrat causes.
 * This marks a couple of things for Flora:
 * Her first appearance and first speaking role since the twelfth series episode, Tram Trouble.
 * Her first appearance in full CGI.
 * This marks a few of things for Gator:
 * His first appearance in a special since Tale of the Brave.
 * His first appearance and first speaking role since the eighteenth series episode, Long Lost Friend.
 * Chris Wedge joins the voice cast.
 * Lightning McQueen is seen in his Rust-eze paint job from Cars 3. This marks the first time since Cars Toons that he has been voiced by Keith Furguson.
 * This marks a few of things for Ant & Dec:
 * Their first appearance in a movie since Alien Autopsy.
 * The first time since Love Actually where they play themselves in a movie.
 * Their first appearance in CGI.
 * The MerseyGirls are seen in their gold outfits in the film. This also marks a few of things for the MerseyGirls:
 * Their first appearance on TV since Britain's Got Talent: The Champions.
 * Their first appearance in CGI.
 * This marks Woody, Buzz, Jessie and the rest of the Toy Story characters's first appearance in a movie since Toy Story 4.
 * This marks Manny, Sid, Diego and Scrat's first appearance in a movie since Ice Age: Collision Course.
 * The first time in a special where Po has said her Cantonese numbering "yāt, yih, sàam" in a special.
 * The first time since Thomas and the Magic Railroad where a real life singer, that being Sia, performs a song during the credits with scenes from the movie.
 * In the Island of Sodor intro using Nitrogen Studios animation, Thomas is voiced by John Hasler instead of Ben Small.
 * Mattel Creations said that during the scene of where Chelsea and Julia are feeling sad about Thomas going missing, a lot of people cried during the scene.
 * The scream that Woody makes when he almost falls into the cave is the scream from Toy Story (1995) when he meets Buzz for the first time.
 * In the movie, Ant is shown to have grown a beard similarly to how his real life counterpart did from May of 2016 until he shaved in late 2018.
 * Ant & Dec make a reference to one their shows, that being I'm a Celebrity...Get Me Out of Here!
 * Dec says his catchphrase, "I'll smash your face in" about four to five times in the film.
 * Oh turns into some of his colours of sight during the movie. Those being:
 * Yellow (for panic and fear)
 * Pink (for likeness)
 * Red (for anger)
 * During the ending credits of the film, these movie and TV show franchises are credited. Those being:
 * Pingu
 * Teletubbies (original and reboot)
 * Cars
 * Finding Nemo
 * Toy Story
 * Ice Age
 * Home
 * Brum
 * The Loud House
 * Ant & Dec's Saturday Night Takeaway
 * Britain's Got Talent
 * Britain's Got More Talent
 * I'm a Celebrity...Get Me Out of Here!
 * This was because the characters from those specific franchises appeared in this film due to copyright reasons.
 * This marks a couple of things for Ashima:
 * This marks her first appearance in a special since The Great Race.
 * The first time where she has fallen in love with another engine, that being Thomas.
 * This marks a few things for Basil Brush:
 * His first appearance in CGI.
 * His first appearance in a movie.
 * The first time since Big World! Big Adventures! where someone breaks the fourth wall.

Goofs

 * The main intro and the Island of Sodor intro are using animaton from Nitrogen Studios. But, for the rest of the movie, it is using animation from Jam Filled Toronto.
 * The scene in where Po uses her karate moves to hit the giant rock, she hits it very hard and succeeds with the rocks blocking the cave exit. But, in reality, she wouldn't be able to do it.
 * The Other Side by Jason Derulo is shown in the credits when it actually wasn't heard in the film. The issue was corrected in the bonus features.
 * A faint crack is seen when the scene cuts to the MerseyGirls being sad.