(written from a Production point of view)
Scott McGinnis (born 19 November 1958; age 57) is a director and former actor from Glendale, California, who played the young lieutenant dubbed as "Mr. Adventure" by Uhura in the film Star Trek III: The Search for Spock. His undershirt was sold off on the It's A Wrap! sale and auction on eBay. 
McGinnis began as an actor in the late 1970s. In 1978, he was cast as a regular in the television sitcom Operation Petticoat, staying with the series until its cancellation the following year. He then appeared in the TV movie Survival of Dana along with Barbara Babcock and Michael Pataki.
He went on to make appearances on such shows as The Facts of Life and Murder, She Wrote (co-starring with Rosemary Forsyth, who played his mother, and Eugene Roche) and had roles in numerous films throughout the 1980s, including Wacko (1983, with Charles Napier), Joysticks (1983, with Logan Ramsey), Secret Admirer (1985, with Leigh Taylor-Young and Cliff DeYoung), Thunder Alley (1985, with Clancy Brown), Class 89 (co-starring Rene Auberjonois and Ed Lauter), You Can't Hurry Love (1988, with Sally Kellerman), and The Boost (1988, with Barry Jenner). He even had the starring role in the 1986 World War I adventure Sky Bandits. However, in 1993, he turned his attention to directing.
His first directing project was the film Caroline at Midnight (1994, with Next Generation guest star Clayton Rohner and Voyager guest actor Zach Galligan). He then directed the horror thriller Last Grip (1995, with Alexander Enberg) before moving on to television. He has since directed multiple episodes of Honey, I Shrunk the Kids: The TV Show, Angel, and multiple episodes of Disney's The Jersey and Nickelodeon's Cousin Skeeter and 100 Deeds of Eddie McDowd. He also produces a popular kid's web site, Global Broadcast 4 Kids.