Lady Christina de Souza

In Planet of the Dead, Lady Christina de Souza is a mysterious, adventure-seeking aristocrat who moonlights as a thief for some excitement in her otherwise boring life. After a heist, she escapes via a London bus. However, that bus winds up in a wormhole, and she meets her match in the wily Doctor. Together, they must battle the deadly Swarm on a planet that holds terrifying secrets.

Actress Michelle Ryan became a superstar in the UK playing Zoe Slater for five years on the BBC soap EastEnders. She also appeared as Katherine Reimer on the mini-series Jekyll opposite James Nesbitt. She was catapulted into American stardom playing the title role in the NBC sci-fi remake of Bionic Woman. She can also be seen as Nimueh in the fantasy drama Merlin.