Nick Jr. started airing Thomas and Friends in 1999 in the UK daily. From 2004 to 2010, they had a night-time block called Nick Jr. Classics (formerly known as Noggin from 2004-2005) that aired episodes of the Classic Series. On August 2004 during weekends, they paired two episodes from Seasons 8 and 9. Thomas began airing new episode on the weekdays as well in 2005. Nick Jr. Too (formally known as Nick Jr. 2) started airing Thomas from 2006. These airings were also used on the US television network, PBS Kids and the Canadian television network, Treehouse. Thomas was taken away from Nick Jr. in 2016 and moved to a different channel, Cartoonito. It still airs on Nick Jr. Too. However, the Nick Jr. Website still features the Thomas activities. After Cartoonitio aired Thomas, the episodes in the half-hour airings of Thomas on Nick Jr. Too were divided into two time-slots repeating the opening, Engine Roll Call song and ending and not having the songs that come in the middle of the airings and the "Today on the Island of Sodor" opening.
In the US during the Summer of 2000, they aired seasons 2 and 3 of Shining Time Station to promote Thomas and the Magic Railroad. Some episodes of Thomas & Friends also played as small segments during commercial breaks before the next show while Shining Time Station was on the air. Thomas also came to Nick Jr. in Australia for a while.
Thomas & Friends' partnership with PBS ended on December 31, 2017 and the Christmas episodes of Season 21 were broadcast on Nick Jr. as a special holiday program. Starting on March 12th 2018, Nick Jr. and the main Nickelodeon channel started airing Thomas & Friends.
Nick Jr. Blocks
- Nick Jr. (1999-2017)
- Nick Jr Classics (Formerly Noggin) (2004-2010)
- Nick Jr. Too (2006-2017)
- Nick Jr. (June-August 2000; 2017-present)
- Nick Jr. (2003-2010)
- In 2000, during Shining Time Station's airtime to promote Thomas and the Magic Railroad, Nick Jr. held a sweepstakes for children to enter to win a train-themed party in their home for their friends, along with Mara Wilson and a life-sized model of Thomas as special guests. Several winners would also have won a Wooden Railway Figure 8 set.