Leonard Nimoy said Fox's "Fringe" had the right stuff to draw him out of retirement and back on to the small screen.

Nimoy made his first on-screen appearance in two years on the latest episode of "Fringe," appearing in person as William Bell, a character for whom he did a voiceover appearance a year ago.

Nimoy told reporters this week he is a fan of executive producer J.J. Abrams, who also directed the recent film version of "Star Trek" and felt he was a good fit with "Fringe."

"All the characters are fleshed out wonderfully and the chemistry amongst the cast is terrific," he said. "I wanted to be part of this project."

Nimoy also told CNN he and Abrams have been discussing roles in future "Star Trek" films even though he was open to an occasional gig with the right project such as "Fringe."

"There are certain special situations that come along that can intrigue me," said Nimoy. "This one did."