Robot Trains - Season 1 - Eps 29: Faltering Friendship
One morning, a train is found thrown off the track, all out energy. While everyone watches him worriedly, the train wakes up, pointing the finger at Duke as the attacker. Everyone starts to suspect Duke again and asks him for an explanation. Kay fights for Duke's innocence, but Alf and Duck also start to get suspicious of Duke. At last, Duke declares that he'll get locked up.
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?