(written from a Production point of view)
Michael Berryman (born 4 September 1948; age 73) is an actor from Los Angeles, California, who appeared in two Star Trek productions, both times under heavy makeup. He was born with hypohidrotic ectodermal dysplasia, which prevents the formation of hair, fingernails, teeth and sweat glands. The condition is rare, inherited and incurable.
Outside of Star Trek, he is best known for playing the inbred berserker Pluto in Wes Craven's 1977 horror thriller The Hills Have Eyes. He also appeared in One Flew Over the Cuckoo's Nest (1975, with Louise Fletcher, Christopher Lloyd, Vincent Schiavelli, Peter Brocco, Brad Dourif and make-up by Fred Phillips), Deadly Blessing (1981, with Lawrence Montaigne and Percy Rodriguez), My Science Project (1985, with Robert DoQui and Frank Welker), Weird Science (1985, with Wallace Langham and Robert Rusler) The Hills Have Eyes Part II (1985, with Penny Johnson and Nicholas Worth), Beastmaster 2: Through the Portal of Time (1991, with Rex Pierson, Dan Woren, Frank Welker, Charles H. Hyman, and Wayne Péré), Double Dragon (1994, with Julia Nickson, Leon Russom, Andy Dick, and Jeff Imada), and The Devil's Rejects (2005, with Deborah Van Valkenburgh, Tom Towles, and Daniel Roebuck).