Robot Trains - Season 1 - Eps 3: Lost Memories
After a long rest, Kay wakes up, clueless to who or where he is. Confused, Kay leaves his base and arrives at the Fountain Plaza. There, everyone welcomes Kay, but Kay doesn't remember anything about his friends. He goes sullen after listening to how great he used to be, and his friends decide to help him get back to his old self.
About Robot Trains

Title: Robot Trains
First Air Date: 2015-02-26
Last Air Date: 2019-05-19
Status: Ended
Rating: 5.7/10 (from 3 votes)
Language: KO
Seasons: 2
Total Episodes: 84
Network: Unknown
Genres: Animation, Kids, Action & Adventure, Comedy, Sci-Fi & Fantasy, Family
Production Companies: CJ ENM, Union Investment Partners, Woori Investment Co.
Synopsis
Set in the "Train World" where all citizens are trains. However, among the residents there are special trains that can transform into robots, the Robot Trains! Featuring our 5 train heroes, with special powers: Kay, Alf, Duck, Selly and Victor - and their exciting adventures. Can the Robot Trains save the village from the evil dark forces that be?