Colonel Lethbridge-Stewart’s first appearance in The Web of Fear

“The what?”

Spearhead from Space - season 07 - 1970

“Your agents are always picking up traces of the Master.”

Colony in Space - season 08 - 1971

“Unless you’ve got some better plan…”

The Mind of Evil - season 08 - 1971

“You can see the effect, but never the cause.”

The Three Doctors - season 10 - 1973

Doctor Who episodes | Story: 051 | season 7
↳ Spearhead from Space

“You really believe in a man who has helped to save the world twice, with the power to change his physical appearance? An alien who travels though time and space - in a police box?!?”