Mr. Conductor is the ever-cheerful 18-inch tall conductor and regular visitor to the Island of Sodor. To date, there have been three Mr. Conductors who have lived at Shining Time Station. The first was portrayed by former Beatles drummer Ringo Starr during the first season as well as the TV special 'Tis a Gift. The first Mr. C was initially very wary about newcomers, but gradually decided to reveal himself to Matt, Tanya, Stacy, and Harry. He provided a voice of reason to Matt and Tanya, introducing them to stories about Thomas the Tank Engine and his friends to show them a way to solve a problem the two friends encountered. It was thanks to him leaving his hat behind when he temporarily left the station during Is This the End? that J.B. King realized how important Shining Time Station was to his childhood friend, deciding in the end to leave the station open.

Following the events of 'Tis a Gift, Mr. Conductor decided to leave Shining Time Station to assist Mr. Nicholas at the North Pole.

When the second season began, the second Mr. Conductor, (portrayed by comedian George Carlin), a cousin of the first Mr. C, arrived at the station. The second Mr. Conductor was as friendly and wise as his cousin, also using stories about Thomas and his friends to provide a lesson for Dan and Kara. Easily more fun loving and laid back than his cousin, Mr. C usually appeared in various other outfits than his usual conductor's uniform. He was also armed with various forms of magic dust, as well as the occasional wishing star.

The third Mr. Conductor, (portrayed by actor Alec Baldwin) lived at the station during the events of Thomas and the Magic Railroad, which delved further into the sources of his family's magic gold dust and just how important that magic was to the smooth running of both Shining Time Station and Sodor.

There are also two other known members of the Conductor family. Sister Conductor is the sister of the second Mr. Conductor and has a love for airplanes, making her different from the rest of the family. She appears in One of the Family. The other is C. Junior, who is another cousin. He appears in Thomas and the Magic Railroad. Junior enjoys relaxing and pulling pranks, but often gets into trouble. The second Mr. Conductor also has an evil twin.

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