David Tennant’s first season saw the Tenth Doctor continue to travel with Rose Tyler (Billie Piper) after regenerating, but he also reunited with a classic companion who witnessed his regeneration in ...

Under Moffat's watch, the Master has been regenerated as Missy and played by scene stealer Michelle Gomez in nine episodes from 2014 and 2015. We already knew that Missy returns in episode four, ...

Susan Foreman reveals that she shot a different ending for the episode — one that confirms a dropped plot point.