Sinclair (Imperial Moon)

Captain Sinclair was the captain of  Lynx, one of the British Imperial Fleet ships landing on the Moon in 1878.

He came to the rescue of Captain Haliwell and his team, including the Doctor and Turlough, who were being chased by giant, spider-like creatures.

He became leader of the group after Haliwell and Emily Boyes-Dennison were taken by a metal claw. He created an alliance with the Phiadoran women and they were helped to travel to the citadel. (PDA:  Imperial Moon)