Actor Simon Callow also returns to the show for the finale, reprising his role as Charles Dickens; previously seen in the Series One story, The Unquiet Dead (written by, wait for it, Mark Gatiss).
The God Complex audio commentary
NBC Today finale set visit[SPOILERS]
The Wedding of River Song synopsis
2011 Christmas Special details
The Wedding of River Song details revealed
Christmas Special 2011 filming [SPOILERS]
Series 6, Part 2 trailer podcast