The Second Doctor and his companions Jamie and Zoe encounter the Cybermen when they crash-land on Earth in the late 21st century. The invasion is orchestrated by the Cybermen from the planet Mondas, who plan to conquer Earth by infiltrating global military bases with their agents. The Doctor must race against time to thwart their plans and prevent the subjugation of humanity.

The Invasion is widely regarded as a classic Doctor Who serial, celebrated for its high production values, compelling story, and the introduction of the Cybermen as a significant and terrifying threat. It is often praised for its cinematic feel, ambitious scope, and Patrick Troughton's performance as the Doctor.

• Praised for its tense atmosphere and effective portrayal of the Cybermen.
• Lauded for its strong direction and engaging plot.
• Considered a benchmark for the show's early success in blending action and suspense.

Google audience: Audience reception for this classic serial is overwhelmingly positive, with viewers frequently highlighting its exciting narrative and the imposing presence of the Cybermen as major strengths.

This story was the first time the Cybermen were depicted with their distinctive segmented armour and wheeled bases for their transport, creating a more menacing and iconic look.