The actor's character, The Bendu, appeared in the trailer for the third season, launched at yesterday's Star Wars Celebration 2016 taking place at the ExCel Centre in London this weekend. The character is introduced by Baker in the trailer as:
"Jedi and Sith - the Light and the Dark - I'm the one in the middle, The Bendu."Baker's involvement was summarised on the official Star Wars website:
The Bendu is a new character that represents the center way of the Force. A concept that originally appeared in George Lucas’s earliest drafts, the Bendu, according to Filoni is a new type of Force user in the galaxy. The Bendu on Star Wars Rebels will be played by Doctor Who alum Tom Baker. “Tom charmed everyone in the room,” according to Filoni. “My wife included.”
The series is due to be broadcast on Disney XD later in the year.
Tom Baker isn't the first Doctor to act in the Star Wars universe: David Tennant played Huyang in the animated series, The Clone Wars, during 2012, a role for which he won a Daytime Emmy for Outstanding Performer in an Animated Program; and of course the alternative Doctor Peter Cushing starred in the very first Star Wars film back in 1977.