Question: Name the American actor, best known for his role as Captain B.J. Hunnicutt in a television series which included a 2-episode story arc where we see the departure of Captain Trapper and his replacement by this new Captain? 
Sentence (from "Mike Farrell"): Michael Joseph Farrell, Jr. (born February 6, 1939) is an American actor, best known for his role as Captain B.J. Hunnicutt on the television series "M*A*S*H" (1975–83).
Relevant evidence: Yes