Chuggington - Season 1 - Eps 19: Koko on Call
Twiga the giraffe is going to have a baby! An excited Koko has been given the job of keeping watch overnight, and fetching Dr. Gosling, the vet, if Twiga goes into labour. That night Mtambo (the safari tour guide train) tells Koko all about nocturnal animals. Koko learns how they use their senses to get round in the dark. When Twiga goes into labour, Koko goes to fetch the vet.
About Chuggington

Title: Chuggington
First Air Date: 2008-09-29
Last Air Date: 2021-03-12
Status: Ended
Rating: 6.9/10 (from 29 votes)
Language: EN
Seasons: 7
Total Episodes: 174
Network: CBeebies
Genres: Animation, Kids
Production Companies: Ludorum
Synopsis
Koko, Brewster and Wilson are three young, adventurous trainee "chuggers", learning about working on the railway in the town of Chuggington, with the help of the railway controller, Vee, the older engines, and their human friends.
Cast

Louis Wint
Wilson (Vocals)

Jacks Dean
Brewster

Madigan Kacmar
Koko

Jordan Reed
Wilson