Peter MacNicol (born April 10, 1954) is probably best known among younger TV viewers for his role as the eccentric attorney John Cage on the show Ally McBeal, but is remembered by previous generations for his similarly over-the-top performance in Ghostbusters II. He currently stars in the geek drama NUMB3RS.

Partial filmography

• NUMB3RS (2005)
• Breakin' All the Rules (2004)
• Crazy Love (2003)
• Bean (1997)
• Ally McBeal (1997-2002)
• Dracula: Dead and Loving It (1995)
• Chicago Hope (1994-1995)
• Radioland Murders (1994)
• Addams Family Values (1993)
• HouseSitter (1992)
• Ghostbusters II (1989)
• Sophie's Choice (1982)
• Dragonslayer (1981)