Tom Sheridan
From Tardis Wiki, the free Doctor Who reference
Tom Sheridan voiced the Space Captain in the Doctor Who television story The Rescue. He also had the uncredited role as Sandy in the same serial. (DWM 325)
Sheridan's only other known acting credits were in episodes of The Big Pull, No Hiding Place, BBC Sunday-Night Play and More Faces of Jim. Doctor Who was his final known acting credit.