Here's a show that was really two series in one.
PBS' Shining Time Station incorporated short stories from England's Thomas The Tank Engine & Friends, which bowed six years earlier, thus celebrating its 30th anniversary this year, into the fabric of a children's sitcom that ran for four years (1989-93) here in the US.
Didi Conn (ex-Benson, Fonz & The Happy Days Gang) starred as Stacy Jones, the owner of Shining Time Station, which she inherited from her grandmother. Ex-Beatle Ringo Starr crossed over from Thomas, re-recording his narration from the original stories to fit his new role as Mr. Conductor. However, Ringo opted to refocus on his musical career and left in 1990, replaced by comedian George Carlin, with the storyline explanation being that the new Conductor was the cousin of the original. In addition, Carlin dubbed over the narrative from the Thomas segments from the first two seasons, for the likely purpose of maintaining continuity for those coming in late. An unnecessary move, though, as the original episodes with Ringo are still available, as you'll soon see.
Meanwhile, back in England, Carlin was called in to take over as the storyteller for Thomas, but it was well after Starr had relinquished those duties. There have been others since, including Alec Baldwin (currently a pitchman for Capital One) and Pierce Brosnan, who took on the gig after his stint as James Bond had come to an end. Thomas is still in production in England, though it's been 20 years since Shining Time ended. The series hasn't been seen since cable runs on Fox Family (now ABC Family) & Nick, Jr..
Here's the opener, "A Place Like No Other", courtesy of a Shining Time Station fan channel on YouTube:
Unfortunately, Didi Conn hasn't gotten much work since the series ended. Co-star Brian O'Connor (Horace Schemer) later landed on VH-1 as a game show host, of all things, and hasn't been seen since.