Tue, Jan 26, 1982
The Doctor needs to stop Adric from siding with Monarch and get Bigon quietly restored (who was mechanically lobotomized for previously siding with the Doctor). The ship then gets turned into one big multi-cultural dance party so the Doctor can make a desperate leap for the TARDIS, floating just outside the spaceship, and stop Monarch's plans for Earth.
Mon, Mar 1, 1982
The TARDIS arrives in England, 1925, near to where a mysterious, gurgling man has escaped his bonds and started strangling servants. The Doctor is "expected" and taken (along with Tegan, Nyssa, and Adric) to the Cranleighs' country estate where The Doctor participates in a cricket match and Nyssa turns out to be the near spitting image of Ann, fiancée of Charles Cranleigh. They all stay for an afternoon costume ball. Tegan teaches others how to do the Charleston while Adric eats, but The Doctor finds himself searching through secret passageways in his bathrobe after the gurgling man steals his clothing and party costume to attend the ball and deal with one of the guests.
Tue, Mar 23, 1982
The Doctor's TARDIS is stolen, and tracking it down reveals the existence of an alien named Kalid controlling events in the past. While the Doctor challenges Kalid's motives for being there, Tegan and Nyssa discover the source of Kalid's power - an even greater threat for the Doctor.
Mon, Mar 29, 1982
The Master commandeers the Doctor's TARDIS, leaving the stranded Time Lord time to work out the mystery of the alien sanctum he's been trying to enter. Inside lies an immense power - the entire Xeraphin race, thought long lost but distilled into a single living essence, ready for rebirth but now suffering a dual gestalt personality, good versus bad, thanks to the Master's meddling with it. As the two Xeraphin halves enter into a struggle for dominance of the whole, the Doctor works for a favorable outcome before the Master can succeed at turning them into his new power source.
Tue, Mar 30, 1982
Incorporating the Xeraphin race into his TARDIS power system, the Master has won, but technical obstacles and a bit of sabotage from friendlies give the Doctor a bargaining chip for the lives of the hijacked and enslaved airline passengers and crews - with maybe, just maybe, some hope for the Xeraphin race as well.