The Web Planet

The TARDIS is drawn to the planet Vortis by a strange force. Whilst the Doctor and Ian attempt to investigate the force possesses Barbara and she leaves the TARDIS, leaving Vicki inside alone.

Barbara is taken by the ant-like Zarbi to the slave coloby whilst the Zarbi drag the TARDIS to their Web headquarters. Meanwhile the Doctor and Ian become caught up in the struggles of the Menotptra who have been enslaved by the Zarbi.

The Doctor goes to the Web centre and finds the Animus, a large spider-like mind parasite that is controlling the Zarbi. The Menoptra attempt to regain their planet, and the invasion fails.

Barbara uses an isotope brought to the planet by the Menoptra that destroys the Animus, returning the Zarbi to a mindless state, and allows the Menoptra to liberate themselves and return to their planet.

• The Zarbi: Robert Jewell (1-3,5,6), Hugh Lund (3,5,6), Kevin Manser (3,5,6), John Scott Martin (3,5,6), Jack Pitt (1-3,5,6), Gerald Taylor (1-3,5,6);
• Vrestin: Roslyn de Winter (2-6);
• Hrostar: Anne Gordon (2,4,5);
• Hrhoonda: Arthur Blake (2);
• Animus Voice: Catherine Fleming (2-6);
• Hetra: Ian Thompson (4-6);
• Captain Hilio: Martin Jarvis (4-6);
• Prapillus: Jolyon Booth (4-6);
• Hlynia: Jocelyn Birdsall (4-6);
• Nemini: Barbara Joss (4-5);
• Walk-Ons: Ken McGarvie, Len Russell;