Hellraiser | Hellbound: Hellraiser II | The Freelance Hellraiser | Hellraiser III: Hell on Earth | Jani "Hellraiser" Sointula | Hellraiser: Hellworld | Hellraiser (franchise) | Clive Barker's Hellraiser | Adam and Dave's Bloodline |
Harnos is known for portraying Jennifer, the first wife of main character Mark Greene on ER (1994–2002), Rimmer in the Action/Horror film Hellraiser: Bloodline (1996), Dotty from The Girl Gets Moe (1997) film, Sarah Hughes in Cold Dog Soup (1990) film, Linda Wyatt in Judgement Night (1993) film, Rhonda in Pink as the Day She Was Born (1997) film, and as Sid in Denial (1990) film.
On film, he played Carducci in the (1996) action/horror film Hellraiser IV: Bloodline, Mason Strode from Halloween, Seabiscuit's Vet from Seabiscuit (2003), Bob from Fits and Starts, and Agent Ellroy from Chain of Command.