His television credits include: Max Headroom, Dallas (as Brett Lomax), Falcon Crest, Baywatch, Murder, She Wrote, Lois and Clark: The New Adventures of Superman, JAG, Charmed, The Young and the Restless, Swamp Thing,[1] and The Langoliers.

A Paramount internal memo dated from 1987 has revealed that Chapman was once considered for the part of Data in Star Trek: The Next Generation.

[2] The similarity between his name and that of John Lennon's murderer, Mark David Chapman, prevented him in 1985 from playing Lennon in John and Yoko: A Love Story, a biographical film produced by NBC; Yoko Ono had been deeply involved in the production and had herself been initially impressed with his audition and approved his casting prior to discovering his full name was Mark Lindsay Chapman.

[citation needed] Chapman's full name surfaced again when the story was published in Britain, and reporters began making inquiries about the actor, who was then working as a bricklayer[why?]

Eventually Lindsay did portray Lennon, in the 2007 film Chapter 27, which had Mark David Chapman as the lead character.