This is why the Gallifreyans have referred to him as the President all the way to the modern show in Steven Moffat and Peter Capaldi's run.
"The Deadly Assassin": Old School Pulp in Timelord Clothing
The story starts out riffing on the Kennedy Assassination, then rips off The Most Dangerous Game by having the Doctor (Tom Baker)[...]
Peter Pratt Archives
The writers planned to reveal something big, like the Master was going to turn out to be The Doctor's brother or something, but Delgado passed away prematurely.
The Second Master: Melting
Peter Pratt played the Master in the 4th Doctor story "The Deadly Assassin" as a decaying corpse in a raggedy robe He was burning through his[...]