George Trenchard

George Trenchard was in charge of the prison on Fortress Island where was incarcerated.

Biography
Trenchard looked back fondly on his time serving in the North West Frontier Province of the British Raj, with a superior officer who gave him clear orders. He was the great-great-grandson of Wilfred Trenchard, who was killed in the Indian Mutiny. (PROSE: Doctor Who and the Sea-Devils)

Trenchard told the Master that he used to be the governor of a British Empire colony once; however, shortly after Trenchard arrived, the colony claimed independence.

Shortly after the Master arrived, he persuaded Trenchard that "enemy agents" were working against him and the country. These "enemy agents" were also responsible for ships recently sunk in the area. Trenchard willingly helped the Master, going so far as to distract Captain John Hart with talk of golf, while the Master (disguised as a naval officer) stole various pieces of equipment. Trenchard became panicked when he found out Jo Grant had seen the Master at the base, while the Master didn't care. The Master was able to manipulate him because of Trenchard's strong patriotic views.

Following the Master revealing his contact with the Sea Devil, Trenchard began to realise he had been manipulated and he began to be suspicious of the Master. Convinced the Master had received a message from the Sea Devils, Trenchard decided to alert the authorities by telephone but was unable to get through to the Minister. By one account, when the Sea Devils attacked the prison, Trenchard fought back with his old service revolver but was killed after he shot dead two Sea Devils. (TV: The Sea Devils) By another account, he was killed without firing a single shot after he forgot to take off his revolver's safety catch. When the Third Doctor, Jo Grant and Captain Hart later found Trenchard's body, the Doctor noticed the safety catch was still on and reset the gun when Jo and Hart weren't looking, in the hopes of making sure that no one would find out Trenchard died a failure. (PROSE: Doctor Who and the Sea-Devils)