Jeffrey Marcus (b. February 21, 1960 in Harrisburg, Pennsylvania, U.S.) is an American actor who stars on television, film and theater. Between 1980-1990, Marcus appeared on and off-Broadway in such plays as, The Survivor and Almost an Eagle starring James Whitmore. Jeff is best known for his television role as Albert Einstein, the Tenctonese janitor of the L.A.P.D. precinct in the cult science fiction TV series Alien Nation. The show was canceled by the Fox Network after a single season, but Fox brought it back in the 5 TV movies. Jeff reprised his role as Albert Einstein in all the 5 "Alien Nation" TV movies, which they are Alien Nation: Dark Horizon (1994), Alien Nation: Body and Soul (1995), Alien Nation: Millennium (1996), Alien Nation: The Enemy Within (1996), Alien Nation: The Udara Legacy (1997).
Marcus' first feature film role was in the 1981 classic romance film Endless Love. His other films include The Chosen (1981), Legal Deceit (1997), Freaky Friday (2003), and Just Like Heaven (2005).
Marcus has starred in many TV movies, most recently, "Our House" with Doris Roberts. Marcus starred in the 1981 TV movie Senior Trip, which also starred "Alien Nation" co-star Ron Fassler.
He has made a few guest appearances on TV shows like JAG, NYPD Blue, Chicago Hope, and Tracey Takes On....
As Jeffrey Marcus, he runs a respected acting class and coaches actors in Los Angeles.