Something seemed amiss about the Doctor's execution, so the Castellan has Commander Maxil discreetly but fully look it. Meanwhile, as the Doctor meets the anti-matter being inside the Time Lord Matrix, Tegan and her cousin's friend run afoul of a bird-like alien back on Earth.
Quest roles:
Colin Baker(The Doctor), Michael Gough(The Toymaker), Ian Collier(The Renegade (voice)), Elspet Gray(Chancellor Thalia), Leonard Sachs(Lord President Borusa), Paul Jerricho(The Castellan)