Kook

Kook was a crew member on the Seamancer. He was trapped on Rigel Four after the Doctor's TARDIS accidentally transported the Seamancer there and did not like the Doctor or Martha Jones, as he blamed the Doctor for the whole event. When he was sentenced to death, he made a deal with King Alalal, that resulted in the battle against Kalis and the Surobans. Lord Alalal turned on Kook but the Doctor managed to rescue him in time. Kook then returned to Earth, leaving Captain Ketly and his crew mates. (DWAM: Shipwreck!)