Doctor Who: The Lazarus Experiment

Series 3, episode 6

The Doctor takes Martha back to present-day Earth, where she finds her sister working for an elderly scientist who has built a machine to reverse the ageing process. When he tests it on himself, his youth is restored, but the experiment goes wrong and he transforms into a ravenous monster that must feed on humans to survive. Guest starring Mark Gatiss and Thelma Barlow

Cast

Image for David TennantDavid Tennant...The Doctor
Image for Freema AgyemanFreema Agyeman...Martha Jones
Gugu Mbatha-Raw...Tish Jones
Image for Reggie YatesReggie Yates...Leo Jones
Adjoa Andoh...Francine Jones
Image for Mark GatissMark Gatiss...Lazarus
Thelma Barlow...Lady Thaw
Lucy O'Connell...Olive Woman
Bertie Carvel...Mysterious Man