
Michael John Berryman (born September 4, 1948) is an American character actor. Berryman was born with hypohidrotic ectodermal dysplasia, a rare condition characterized by the absence of sweat glands, hair, and fingernails; his unusual physical appearance has allowed Berryman to make a career out of portraying characters in a number of cult films, horror films and B movies. He first came to prominence for his roles in Miloš Forman's One Flew Over the Cuckoo's Nest (1975) and Wes Craven's The Hills Have Eyes (1977). He has appeared in a wide range of feature films and television series, including Star Trek, The X-Files, and Highway to Heaven, in which he portrayed Satan.

One Flew Over the Cuckoo's Nest
1975 · as Ellis

Spy Hard
1996 · as Bus Patron with Oxygen Mask

Weird Science
1985 · as Mutant Biker

Star Trek IV: The Voyage Home
1986 · as Starfleet Display Officer

The Devil's Rejects
2005 · as Clevon

New York Ninja
2021 · as The Plutonium Killer (voice)

Star Trek V: The Final Frontier
1989 · as Sybok Warrior (uncredited)

The Lords of Salem
2013 · as Virgil Magnus

Scooby-Doo! Curse of the Lake Monster
2010 · as Zombie Head

The Hills Have Eyes
1977 · as Pluto

The Evil Within
2017 · as Cadaver

The Barbarians
1987 · as Dirtmaster

Double Dragon
1994 · as Maniac Leader

The Independent
2000 · as Michael Berryman

The Hills Have Eyes Part 2
1985 · as Pluto

Spawn of the Living Dead

My Science Project
1985 · as Mutant #1

Outrage: Born in Terror
2009 · as Obeah