As the ice retreats and the land flowers, Man the hunter turns to agriculture, domesticating plant and animal, imposing his will on the wild wheat and the horse.
The programme follows the changes in Man as he marches out of Africa, through desert and ice age, to leave the print of his hand in a dark Spanish cave.
The Doctor and his friends ambush two Daleks as part of their plan to get back into the city, but the Daleks are on the verge of unleashing their virus.
Ancient Warrior, an aged Indian accompanied by Caine, seeks burial in his sacred, ancestral land. But the burial site is located dead center in a violent, Indian-hating town called Purgatory.
The Doctor and his friends escape from the Dalek base, prompting the Daleks to devise a plan to wipe them out.
A gambler on a hot streak entrusts his winnings to Caine. But the money is stolen, the gambler is killed, and Caine seeks answers to the mysteries surrounding both events.
With the news that the Reynolds household will soon be numbering three and with Bill bragging about "ringing the bell," Eddie devises a plan to prove his manhood. Brace yourself for a master class in seduction.
The Doctor and Codal escape from their cell and meet up with the Thal commandos who are trying to get into the Dalek base.
The entire family suffers a crisis when Olivia is stricken with polio. Dr Vance prescribes the accepted treatment, but Olivia does not get better. John-Boy learns of a new treatment practiced by sister Kenny and the family tries it to success in time for the Easter service.
It's pay day at Grace Brothers and the staff realize that their money just doesn't go very far. An opportunity for a bonus arises when a customer loses a diamond and offers a £100 reward. Greed gets the better of everyone, except Mr. Grainger, and soon they're conspiring behind each others backs. Mr. Mash throws a wrench in the search after he damages a jeweled dress, causing a multitude of "diamonds" within the department.
Out of the frying pan and into the fire! Having escaped the wives for the evening, Eddie and Bill find themselves trapped in a lift with Arthur and Jacko and no sign of rescue. Nerves start to fray but who will crack first ?
The Doctor is captured by the Daleks, while Jo is rescued by a friendly Spridon named Wester.
Stone goes undercover as a bum to investigate the beating death of three homeless men.
Caine encounters Isaac Montola, a freed slave from Brazil skilled in a fighting style he has never seen. When Caine intervenes in a fight to save Isaac's life, a precious stone is lost, setting off a chain of events involving a widow and her children, and the piano-playing groom-to-be,
Mr. Grainger's trousers are missing, along with the central display. The staff learns that the space was freed up for the "His & Hers" fragrance display. Mrs. Slocombe is outraged that they went her to take down her underwear and put perfume there in its place. The glamorous salesgirl causes stirrings in the trouser department. When it's discovered that free stockings and ties are given out with every scent purchase, both departments formulate a plan to oust the intruder.
It's time for the showdown between Eddie's 'snowflakes' and Bill's 'Sambos'. Maple Terrace braces itself for war! Will Eddie keep the Lion and Lamb white ? Will Bill use black magic ? Will Jacko ever buy a round ?
The planet Spiridon, the year 2540. The Doctor and Jo arrive on the trail of the Daleks, and find unexpected allies in the shape of a Thal suicide squad. But what has brought the Daleks here in the first place?
The crew of Los Angeles County Fire Department Station 51, particularly the paramedic team, and Rampart Hospital respond to emergencies in their operating area.