If the trailer for Doctor Who's The Day of the Doctor - 50th Anniversay Special that arrived this weekend didn't have enough footage for you, then this second extended trailer should be right up your alley. Current Time Lord Matt Smith comes together with David Tennant and Billie Piper, who are appearing on the show for the first time since they left in 2010. Watch as the Doctor's dangerous past comes back to haunt him in this upcoming special, debuting Saturday, November 23 on BBC America.