With an anti-matter being trying to enter the universe through the Doctor, risking the destruction of everything, there is only one clear course of action for the High Council of Time Lords to take: execute the Doctor. Meanwhile, Tegan arrives in Amsterdam and hears about what's become of her cousin from his unscathed friend.
Quest roles:
Colin Baker(The Doctor), Michael Gough(Councillor Hedin), Ian Collier(The Renegade (voice)), Elspet Gray(Chancellor Thalia), Leonard Sachs(Lord President Borusa), Paul Jerricho(The Castellan)