It stars Peter Cushing as Dr. Who, Roberta Tovey as Susan, Jennie Linden as Barbara, and Roy Castle as Ian.

Elements from the programme are used, however, such as various characters, the Daleks and a police box time machine, albeit in re-imagined forms.

Reaching Tardis, Susan collects the drugs and then encounters Alydon, leader of the Thals, a species that fought the Daleks in an atomic war centuries previously.

Susan explains to the others that, according to Alydon, the Thal crops have failed and they have come to the Dalek city, hoping to trade the anti-radiation drug formula for food.

They get Susan to write a letter which they will leave for the Thals, stating that they will provide food, to be collected from the city, as an act of friendship.

Thwarted, they decide to detonate a neutron bomb to increase the planet's radiation to a level which even the Thals cannot survive.

He urges Alydon to fight the Daleks to save his species but he refuses, insisting that the Thals are now peaceful.

In response, Dr. Who pretends to order Ian to take a Thal woman to the Daleks in exchange for the confiscated component.

During the ensuing struggle the Daleks inadvertently destroy their main control console, which kills them by cutting their power and stops the bomb detonation.

Back in the jungle, with the fluid link recovered, the travellers depart in Tardis to return home, with some Thal capes as presents.

They had larger base sections and dome lights than the TV Daleks of the time, making them more imposing,[7] and some were fitted with a two-jawed mechanical claw instead of a plunger.

Originally, the Daleks were to be armed with flamethrowers, but these were vetoed on health and safety grounds and because they were considered too frightening for a young audience.

The actor Barrie Ingham discussed the production in an interview in Australia in 1976 for the Doctor Who fanzine Zerinza.

[12] Radio Times was more favourable, awarding the film three stars out of five, commenting: "this spin-off lacks the bite and inventiveness that set the landmark series apart, unwisely injecting humour into the sparse scenario, and the cheap art direction is strictly '101 Uses for Pink Plastic Sheeting'.

[7] Similarly, Stuart Heritage commented in The Guardian in 2013 that "people don't talk about Dr Who and the Daleks any more".