Doctor Who's David Tennant gets emotional about his coming departure

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Dec 14, 2012, 3:54 PM EST

David Tennant, who is wrapping up his tenure as the 10th Doctor in Doctor Who, told the BBC that he got emotional while reading his final moments in the show.

The Scottish actor has six weeks left of filming, and with the first of four Doctor Who specials airing on BBC One on Easter Saturday, he'll soon hand over the TARDIS to Doctor number 11, Matt Smith, the BBC reported.

The Easter special, "Planet of the Dead," features Michelle Ryan (late of NBC's Bionic Woman) "in a catsuit stealing something important," Tennant told the BBC. "Then she tries to escape on a red bus, a London red bus. But London transport being what it is, it slips through a wormhole in time and space and ends up on a planet on the other side of the universe."

Tennant added: "There's a tiny little hint at the very end that it's all about to get a lot darker. Because obviously at the end of the year, it's the end of the line for the 10th doctor. This is kind of a romp. This is the last time the Doctor gets to have fun, in a way."

When Tennant read the scripts for his upcoming final episodes, he told the BBC: "I might have had a little cry. They were brilliant scripts and very moving. It was quite a big deal, really. I sort of turned the phone off and made sure I could read it straight through without too much interruption."

Click through to read more of Tennant's Q&A with the BBC. "Planet of the Dead" airs on BBC One on Saturday at 6.45 p.m. local time.