The Third Doctor, portrayed by Jon Pertwee, is a character from the British science fiction television series Doctor Who. He first appeared in 1970 and served as the Doctor until 1974. This incarnation is known for his action-oriented approach, often using gadgets and technology to solve problems, and he frequently worked alongside the UNIT organization to combat extraterrestrial threats. The Third Doctor is characterized by his flamboyant style, often wearing a frilly shirt and a cape. He also had a strong sense of justice and a deep commitment to protecting Earth. His adventures included encounters with iconic foes like the Daleks and the Master, showcasing his resourcefulness and bravery.