Thomas & Friends - Season 3 - Eps 18: All at Sea
Duck wishes he could sail to far away lands but Percy tells Duck he'd rather stay on his dry rails. So, when Duck helps Harold out in an emergency situation, he decides that Percy is right and that he would be much happier on his own rails.
About Thomas & Friends

Title: Thomas & Friends
First Air Date: 1984-10-09
Last Air Date: 2021-01-20
Status: Ended
Rating: 6.6/10 (from 122 votes)
Language: EN
Seasons: 27
Total Episodes: 666
Network: ITV1 5 CITV Cartoon Network Nick Jr.
Genres: Animation, Kids
Production Companies: Nitrogen Studios Canada
Synopsis
Thomas & Friends is a British children's television series, which had its first broadcast on the ITV network on 4 September 1984. It is based on The Railway Series of books by the Reverend Wilbert Awdry and his son, Christopher Awdry. These books deal with the adventures of a group of anthropomorphised locomotives and road vehicles who live on the fictional Island of Sodor. The books were based on stories Wilbert told to entertain his son, Christopher during his recovery from measles. From Series one to four, many of the stories are based on events from Awdry's personal experience.