You Only Fail Once is the 37th episode overall and the first episode of Season 4 of Thomas & His Prime Friends.
Summary[]
When Thomas was captured by Chrysalis and her council, it's up to Twilight and Diesel 10 to save him from the evil changling's grasp.
Characters[]
- Thomas
- Percy
- James
- Diesel 10
- Twilight Sparkle
- Pinkie Pie
- Rainbow Dash
- Applejack
- Fluttershy
- Rarity
- Spike
- Starlight Glimmer
- Sunset Shimmer
- Queen Chrysalis
- Cozy Glow
- Lord Tirek
- Mayor Humdinger
- Miles Axlerod
- Anti Thomas (only appearance)
- Gordon
- Emily
- Nia
- Rebecca
- Edward
- Henry
- Toby
- Diesel
- Trixie Lulamoon
- Thorax
- Discord
- SpongeBob
- Patrick
- Squidward
- Sandy Cheeks
- Mr. Krabs
- Plankton
- Ryder
- Marshall
- Rubble
- Chase
- Rocky
- Zuma
- Skye
- Everest
- Tracker
- Lightning McQueen
- Mater
- Cruz Rameriz
Cast[]
- Ben Schwartz as Thomas and Anti Thomas
- Harvey Guillen as Percy
- Rob Rackstraw as James
- John Goodman as Diesel 10
- Tara Strong as Twilight Sparkle
- Andrea Libman as Pinkie Pie and Fluttershy
- Ashleigh Ball as Rainbow Dash and Applejack
- Tabitha St. Germain as Rarity
- Kelly Sheridan as Starlight Glimmer
- Kathleen Barr as Trixie Lulamoon and Queen Chrysalis
- Rebecca Shoichet as Sunset Shimmer
- Sunni Westbrook as Cozy Glow
- Mark Acheson as Lord Tirek
- Ron Pardo as Mayor Humdinger
- Eddie Izzard as Miles Axlerod