(written from a Production point of view)
Denver Mattson (12 July 1937 – 24 September 2005; age 68) was a stuntman, stunt actor, and stunt coordinator who served as stunt double for Budd Albright in the Star Trek: The Original Series first season episode "What Are Little Girls Made Of?". He received no on-screen credit for his work.
Born in 1937, Mattson was a veteran US Army paratrooper before becoming a top motion picture stuntman for more than 40 years. He began doing stunt work on the Irwin Allen-produced television series Voyage to the Bottom of the Sea, from 1964 through 1968, and Land of the Giants, from 1968 through 1970. He would go on to perform stunts in two of Allen's films, The Poseidon Adventure in 1972 and The Towering Inferno in 1974.
Other films he performed throughout his long career include The Hindenburg (1975, directed by Robert Wise and starring Rene Auberjonois), John Carpenter's The Thing (1982, with David Clennon), Police Academy (1984, starring Kim Cattrall and David Graf), Critters (1986, starring Ethan Phillips), Slam Dance (1987, starring Virginia Madsen, Rosalind Chao, Herta Ware, Robert Beltran, and John Fleck), Universal Soldier (1992, starring Leon Rippy and Tommy "Tiny" Lister, Jr.), Sister Act 2: Back in the Habit (1993, starring Whoopi Goldberg), and Lethal Weapon 4 (1998, featuring Richard Riehle).
Mattson also tried his hand at acting, appearing in such films as 1977's The Domino Principle, co-starring Robert Herron and Majel Barrett, and 1994's Wagons East, starring Robert Picardo, Ethan Phillips, Ed Lauter, and Charles Rocket.
Denver Mattson passed away peacefully as a result of kidney disease in September 2005, surrounded by his family. He was 68 years old.