Sat, Sep 10, 1977
With inexplicable electrical problems keeping the lighthouse from maintaining a steady beam, a foolhardy ship crashes against the island rocks. Four shaken and discontent survivors join the people inside where the Doctor surmises they're all being carefully scrutinized, a prelude to an attack.
Sat, Sep 17, 1977
A death scream is heard, yet all are accounted for. Eventually the Doctor finds a body stashed away but hours old, with rigor mortis already settling in, which means there's a chameleon in their midst. Completely cut off from the rest of the world and with an escalating body count, the Doctor wonders just what, exactly, he's locked inside the lighthouse with them all.
Sat, Jan 7, 1978
Materializing at the edge of the cosmos, the frontier of creation, The Doctor, Leela & K-9 encounter four ancient space travelers from Minyos, the first race ever contacted by the Time Lords. All but extinct due to their Time Lords encounter, the Minyans (rejuvenated 1000 times each) have been embarked on a long 100,000 year old quest, searching the universe for the lost race bank of their species to take to a new home world. But their equally old ship is finally failing, succumbing to the gravitational pull of a newly forming sun and taking the Doctor and his party with it.
Sat, Jan 14, 1978
Crashing inside a newly formed planet, the Doctor and others find it inhabited by a slave labor mining society, where rocks are harvested for their radioactive energy and human life has little value. With a population controlled by deliberate cave-ins, poison gas, and periodic sacrifices to an Oracle, the miners, called Trogs, are also descendants from Minyos, and who desperately desire freedom.