Jack Crichton is a fictional male Human scientist in the Farscape television series who was portrayed on screen by Kent McCord. Jack Crichton appears as a special guest in a number of episodes, he is the father of John Crichton, the astronaut and lead character of the series. He appears most frequently in the fourth series when John finally manages to return to Earth albeit briefly.
The Kent McCord made his name in the early eighties as he played the role of Capt. Troy in the 1980's Galactica series where he was a lead character.