Star Wars: The Clone Wars has had several great guest stars over the years known for iconic roles in other popular genre franchises, including George Takei, Simon Pegg and Katee Sackhoff. But for the first time, a Doctor is coming to the series, as none other than David Tennant appears on this coming Saturday’s “A Test of Strength.”

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The episode continues the story arc begun last week, as a group of young Jedi set out to build their first lightsabers. The former Doctor Who star will voice Huyang, a droid who is a crucial part of this journey.This was all set in motion when The Clone Wars' supervising director, Dave Filoni, discovered the joys of Doctor Who. As Filoni explained to IGN, “My wife was the one who got me watching Doctor Who and I am really glad she did. I remember thinking that the series (Doctor Who) had many of the same production challenges that we do on The Clone Wars - creating galactic scale adventures and planets with strange life forms.”When it came to getting Tennant to appear on The Clone Wars, Filoni remarked, “As a fan that has the privilege of playing in the Star Wars galaxy, I am always on the lookout for others who appreciate, and would enjoy, an opportunity to go on an adventure in George’s galaxy far, far away. When I heard the Doctor himself, David Tennant, was a fan of Star Wars I knew I had to find a way to get in contact with him to see if he would perform on The Clone Wars. The result was ‘Huyang,’ an ancient droid in the service of the Jedi Order, whose sole task in life has been overseeing the construction of lightsabers. I thought David was perfect for the part and he did not disappoint. He delivered a performance which impressed even the Master himself, George Lucas.”We’ve got an exclusive clip from the episode, featuring Tennant as Huyang, below.Star Wars: The Clone Wars - “A Test of Strength" airs Saturday, November 10th at 9:30am on Cartoon Network.