Henry Felton

Sir Henry Felton was an electronics engineer who discovered the secret of matter transmission. Having built a prototype transmitter, Sir Henry was abducted by aliens from Proxima Centauri in the Crab Galaxy, who feared that humanity would use the transmitter to spread their war-like ways across the universe. After being rescued by the Third Doctor and the security forces, Sir Henry considered the aliens' fears and decided to destroy the prototype and his notes. (TVA: Ride to Nowhere)