Galaxy 4 - Episode 3 - Airlock

Galaxy 4 - Episode 3. 1965. b/w. Only surviving episode of a 4-part serial. Starring William Hartnell, Maureen O'Brien, Peter Purves. The TARDIS lands on a deserted planet in Galaxy 4, during the middle of a war between two alien races who are not native to the planet. Only the Doctor is aware that tomorrow is the last day the doomed planet will ever see...