Jack Murdock (28 October 1922 – 27 April 2001; age 78) was a prolific American actor who portrayed a self-proclaimed "49er" in the Star Trek: The Next Generation fifth season episode "Time's Arrow".
He made his first acting appearance on television in Mannix (1973) and guest-starred in a number of series until a starring role in the TV movie and series Operation Petticoat (1977). Murdock starred in two films in the 1970s: The Crazy World of Julius Vrooder (1974, with William Lucking, Lawrence Pressman, and Ron Glass), and Moving Violation (1976, with Dick Miller, Stephen McHattie, John S. Ragin, and Jason Wingreen).
He played roles in a number of films through the 1980s, including Any Which Way You Can (1980, with Michael Cavanaugh), Altered States (1980, with John Larroquette and John Walter Davis), Cutter's Way (1981, with Tony Epper, Andy Epper, and Ron Burke), Honky Tonk Freeway (1981, with Terri Garr, Jeffrey Combs, Jerry Hardin, and Nancy Parsons), Sweetwater (1983, with Charles Cooper and Bruce French), Blue Thunder (1983, with Malcolm McDowell, Anthony James, and James Read), Psycho III (1986, with Karen Hensel), Big Top Pee-wee (1988, with Albert Henderson, Kenneth Tobey, Jay Robinson, Eve Smith, Matthias Hues and Kevin Peter Hall) Rain Man (1988), and Gross Anatomy (1989, with Steven Culp, Gordon Clapp, Kay E. Kuter, Clyde Kusatsu, Richard Penn, David Coburn, J. Patrick McNamara, John Short, Bruce Beatty, and Tracee Lee Cocco).
Murdock also guest starred in episodes of St. Elsewhere (1982, starring William Daniels, David Birney, Ed Begley, Jr., Christina Pickles, Kavi Raz, Norman Lloyd, Ellen Bry, and Ben Slack), Scarecrow and Mrs. King (1985), Moonlighting (1987, with Tracey Walter, Jack Blessing, Wren T. Brown, Anthony De Longis, Dick Miller, and Nicholas Worth), Dynasty (1988, with Joan Collins), Matlock (1989, with Alex Daniels, Michael Ensign, and Carolyn Seymour), Forever Knight (1989, with Richard Fancy, Craig Richard Nelson, Gregory Wagrowski, Dendrie Taylor, and Rif Hutton), Cheers (1991, with Kirstie Alley, Kelsey Grammer, and Bebe Neuwirth), Picket Fences (1992, with Justin Shenkarow, Raye Birk, Deborah Van Valkenburgh, Michael Keenan, Kelly Connell, Ray Walston, Roy Brocksmith, Peter Slutsker, Dean Stockwell, David L. Crowley, Mark Phelan, John Harnagel, and Richard Kiley), Roseanne (1995), and Home Improvement (1996).
He made his final appearance as projectionist in the Buddy Faro episode "The Curse of the Faro" in 1998 with Harry Groener.