A crazed scientist keeps the heads of Nazi war criminals alive until he can find appropriate bodies on which to attach them so he can revive the Third Reich.

The TARDIS crew lands in the Himalayas of Cathay in 1289, their ship badly damaged, and are picked up by Marco Polo's caravan on its way along the fabled Silk Road to see the Emperor Kublai Khan. The story concerns the Doctor and his companions' attempts to thwart the machinations of Tegana, who attempts to sabotage the caravan along its travels through the Pamir Plateau and across the treacherous Gobi Desert, and ultimately to assassinate Kublai Khan in Peking, at the height of his imperial power.

Sailor Frankie Martin is offered a thousand pounds by a millionaire in disguise if he can earn a hundred pounds in a week by honest means. Frankie tries his hand as a boxer, a bouncer and a commissionaire, and finally finds success as a singer. He also falls for the charms of night club chanteuse Julie, and this leads to further success when he wins a recording contract.

Sir Charles Hare, a young Irish baronet, gambles his all on one of his horses at Ascot. But the horse is 'pulled', and Sir Charles is forced to sell his Irish estate. His aunt, however, has some surprises in store for him.

Steve and Harry become involved in an art theft. Harry is framed by the crooks, and arrested by the police. Steve has to prove his brother's innocence.

An impoverished racetrack tout discovers that a crooked trainer is about to throw a race involving a nobleman's horse.