PHOTOS: David Tennant And Freema Agyeman In Doctor Who - The Lazarus Experiment #ThrowbackThursday

The Throwback Thursday selection today is a set of promo photos for the Doctor Who episode The Lazarus Experiment.

The Lazarus Experiment was the sixth episode of the third series of the relaunched Doctor Who. The episode starred David Tennant as the Tenth Doctor and Freema Agyeman as Martha Jones. Mark Gatiss appeared as Richard Lazarus with Adjoa Andoh as Francine Jones, Gugu Mbatha-Raw as Tish Jones, Reggie Yates as Leo Jones and Thelma Barlow as Lady Thaw. The episode was written by Stephen Greenhorn and directed by Richard Clark. It first aired on BBC One on 5th May 2007.

Martha's sister Tish is working for the elderly Professor Richard Lazarus, a man who claims he will change what it is to be human. The Doctor can't let a comment like that go without investigation and he and Martha set off to meet her family at the reception where the Professor is to reveal all to the world. 

The Professor's experiment is to rejuvenate himself, and at first it appears he has been successful, emerging from the manipulator as a much younger man. However, the process has caused his DNA to become unstable and before long he begins to mutate into a monstrous prehensile creature and goes on the rampage, draining the life energy from guests at the event. The Doctor and Martha manage to fight back against the creature and believe that Lazarus is now dead. However he has survived and escapes, and the Doctor, Martha and Tish track him down to Southwark Cathedral for a terrifying final showdown.

Meanwhile a mysterious man has been giving information to Francine about how dangerous the Doctor is, information that has come from none other than Harold Saxon himself.

Filming locations for the episode included Cardiff Museum, the Welsh Assembly's Senedd building and Wells Cathedral.