Before Star Trek: Kirk & Gilligan in Horror!

William Shatner and Russell Johnson, icons of 'Star Trek' and 'Gilligan's Island' respectively, began their careers on the horror anthology series 'Thriller.' This series, hosted by Boris Karloff as Frankenstein's Monster, aired in the early 1960s.

Shatner notably starred in 'The Hungry Glass,' portraying a photographer who moves into a haunted house. Johnson played the realtor involved in the sale. Both actors also appeared in other classic anthology shows like 'The Twilight Zone' and 'Alfred Hitchcock Presents.'

'Thriller' featured a notable cast including Leslie Nielsen, Bruce Dern, and Mary Tyler Moore. Boris Karloff himself appeared in five episodes, introducing each one with his distinct voice. The series garnered positive reviews and strong ratings during its run.

Stephen King, in his 1981 book 'Danse Macabre,' declared 'Thriller' to be the best horror series on television. Despite its critical acclaim, the show's second season, which aired in 1962, was its last. Its cancellation was influenced by competition from 'The Alfred Hitchcock Hour.'