David-Troy

David "Dave" Somerville is a Canadian singer who made an appearance on Star Trek: The Original Series, playing Lieutenant Larry Matson in the episode. He was credited as David-Troy.
 * It is unknown why he was credited with a hyphen between his first and last name.

Somerville is best known for the eight years he spent as the lead singer of the popular 1950s quartet The Diamonds, a group whose hits include 1957's "Little Darlin" and 1958's "The Stroll". He left the group in 1961 and embarked on a solo career under the name "David Troy". He later joined another popular quartet, The Four Preps, and even formed his own groups, WW Fancy and Somerville's Diamonds. Over the years, he continued to associate with The Diamonds and The Four Preps.

Somerville studied acting with Leonard Nimoy. Besides Star Trek, he has also appeared on the television shows McCloud (with Whit Bissell and Ken Lynch), The Amazing Spider-Man (with Ellen Bry), and Quincy, M.E. (starring Robert Ito and Garry Walberg). He also co-wrote the theme song for the hit ABC series, The Fall Guy.

More recently, Somerville has been singing with a group called Triple Gold, a trio of singers who represent the groups The Diamonds, The Four Preps, and The Association. He also continues to perform as lead singer of The Diamonds for concert shows. He currently performs under the name "Diamond Dave" Somerville.