Mark Horowitz has: Played Himself - Co-Executive Producer in "NCIS: Behind the Set: The Production Design of NCIS" in 2007. Played Himself - Co-Executive Producer in "NCIS: Picture Perfect: The Look of NCIS" in 2007. Played himself in "Nine is Fine" in 2012. Played himself in "Casting Off" in 2012. Played himself in "Episode Two Hundred" in 2012. Played himself in "NCIS: Season 10 - A Death in the Family" in 2013. Played himself in "NCIS - Season 10: X Marks the Spot: A Look at Season X" in 2013.
Seymour Horowitz has: Played Washington Demonstrator in "Countdown to Looking Glass" in 1984. Played Old Reporter in "Liberty" in 1986. Played Landlord in "A Man Called Hawk" in 1989. Played Dr. Mark Harlow in "Homicide: Life on the Street" in 1993. Played Al the Cook in "The Surprise Party" in 2001. Played Grieving Father in "The Wire" in 2002. Played Marv in "The Nightowls of Coventry" in 2004.
A man called Mark Horowitz (not the science guy!)
Mark Crees has: Played Thomas in "Rush" in 2008. Played MC in "Mark Loves Sharon" in 2008. Played Mark in "Out Here in Suburbia" in 2010. Performed in "Government Funding Body" in 2012. Played Max in "Fighting Chance" in 2013.
Mark Holman has: Performed in "Demon Queen" in 1986. Played Action in "Prototype" in 1992. Played Tick in "Pure Danger" in 1996. Played Musical Dancer in "Confetti" in 2006. Played Mark in "Courier" in 2009.
Neil Engelman has: Played Mark in "Saccularius" in 2011. Played Dave in "Sugar Shop" in 2011. Played Hawks in "I Know Jack Venice" in 2012. Played Partygoer in "Judge-Mental" in 2012. Played Sam in "Social Etiquette" in 2012. Played Kyle in "Snap" in 2013. Played Dante in "Aden" in 2013. Played Samuel Horowitz in "La La" in 2014.
Mark Sealey has: Played Mark in "Dramarama" in 1983. Played Alf White in "Casualty" in 1986. Played Buddy in "Buddy" in 1997. Played himself in "Pantoland" in 1997. Played Zephyr in "Big Fat Gypsy Gangster" in 2011.
Mark Samaranayake has: Performed in "Landaka Mahima" in 1965. Performed in "Sitha giya thane" in 1967. Performed in "Rahas Dupatha" in 1967. Performed in "Pipena kumudu" in 1967. Performed in "Dehadaka Duka" in 1968.
Mark Mancha has: Played Mark in "The Parting" in 2012. Played C.J. Marin in "Wordplay" in 2012. Played Roy in "No Child Left Deprived" in 2013. Played Young Mike in "Nature of the Beast" in 2013. Played Aden in "Because These Kids Are..." in 2013.
Mark Paskell has: Played Mark Hopkins in "Falcon Crest" in 1981. Played Perry in "The Landlord" in 1998. Played Clown in "Carnival of Souls" in 1998. Played Kahldir in "Dead Game" in 2009. Played Himself - Escape Artist in "Nathan for You" in 2013.
Mark Teschner has: Played himself in "Good Morning America" in 1975. Played himself in "SoapTalk" in 2002. Played himself in "I Wanna Be a Soap Star" in 2004. Played himself in "AKA Private" in 2011. Played Mark in "obSETHed" in 2012. Played Mark Teschner in "The Remake" in 2014.
Mark Ehrenfried has: Played himself in "Stern TV" in 1990. Played himself in "Zauberhafte Heimat" in 1993. Played himself in "Danke, Anke" in 1998. Played himself in "TV total" in 1999. Played himself in "Stern TV Reportage" in 2001. Played himself in "Die Mozartshow" in 2006.
Actor Mark Harmon.