(written from a Production point of view)
John Hancock (4 March 1941 – 12 October 1992; age 51) was the actor who played Vice Admiral Haden in the Star Trek: The Next Generation third season episode "The Defector" and the fourth season episode "The Wounded".
Hancock was born in Hazen, Arkansas. He started to work as an actor in the late 1960s and his film credits include the comedy sequel Airplane II: The Sequel (1982, with William Shatner, Earl Boen, Louis Giambalvo, Sam Anderson, Gary Faga, Louise Sorel, Bruce French, Marcy Lafferty, Dennis Howard, John Paragon, Elisa Goodman, and John Vernon) and the romance 10 (1979, with Denise Crosby, Lisa Chess, Michael Champion, Jeanetta Arnette and William Lucking). He also had recurring roles as Judge Richard Armand on the drama series L.A. Law (1986-1991), as Deputy Commissioner Hank Bishop in the comedy series Pacific Station (1991-1992, with Richard Libertini), and as Ike Johnson in the comedy series Love & War (1992, with Michael Nouri and Suzie Plakson).
Hancock died of a heart attack in 1992 in Los Angeles, California.