The Doctor and Sarah answer a distress call and find themselves on Zeta Minor, the last planet of the known universe, where a Morestran expedition has gone missing.
Did You Know?
Fans voted this number 84 in a countdown of the 163 Doctor Who
(1963) stories in Outpost Gallifrey's 40th anniversary poll in 2003. See more
You and I are scientists, Professor. We buy our privilege to experiment at the cost of total responsibility.