The Doctor arrives on Mars in the year 2059 and joins the first human Earth colony led by Adelaide Brooke. The day he arrives is also the day history records the entire settlement destroyed in an unknown cataclysm with all members of the settlement being killed. Everyone soon realizes that colonists are being infected by some unknown agent and are being transformed into zombie-like creatures. For reasons that are eventually explained, The Doctor is not prepared to save them and tells Brooke that she has to die. He quite torn by this decision and eventually chooses another path, one that will have other repercussions for him in the future.
Did You Know?
This episode takes place on November 21, 2059. See more
Why does the Doctor return Adelaide to the one place in space & time that will have catastrophic events on the future rather than letting her live out her days in isolation or in a different time where history can play out as it should? He causes Adelaide's suicide by his actions. Also, there were two other survivors who would have changed the future. As a fixed point in time, this would have caused a paradox. See more
Don't drink the water. Don't even touch it. Not one drop.
Doctor Who Theme
Written by Ron Grainer
Arranged by Murray Gold
Performed by BBC National Orchestra of Wales See more