Dick Powell's Zane Grey Theatre (1956)

S18E27 Logopolis (3)

Nyssa's surprising return from Traken adds a twist to the group's mission as Adric teams up with the Monitor of Logopolis to rescue the Doctor before it's too late. Meanwhile, the Master, now free to execute his plans, prepares to unveil his ultimate objective, unaware that it will trigger an unprecedented disaster.