Garrick Hagon
From Tardis Wiki, the free Doctor Who reference
Garrick Hagon (born 27 September 1939) played Ky in The Mutants.
He is perhaps more famous for a smaller role, however. He played Luke Skywalker's friend, Biggs, in the original Star Wars movie.
He provided commentary for The Mutants 2011 DVD release in episodes two, four and six.