With the prosecution case concluded, the Doctor begins his defence, an adventure from his own future. Aboard the starliner Hyperion 3 in the year 2986, trouble is brewing. A murderer is aboard - and something very nasty's stirring in the hydroponics bay...
Elenco:
William Hartnell
,
Patrick Troughton
,
Jon Pertwee
,
Tom Baker
,
Peter Davison
,
Colin Baker
,
Sylvester McCoy
.