Star Trek legend Leonard Nimoy is all set for a guest appearance on US sci-fi drama, Fringe.

Nimoy will play Massive Dynamic founder William Bell for the conclusion of the first series of the show and show’s producer Roberto Orci says the final three episodes will be mind blowing.

He said: “We were saving so many juicy secrets, and we’re actually going to stick a bunch of them in the finale. That may be the worst idea ever, but we’re doing it.”

Joshua Jackson, who plays Peter, added: “The episodes that we’re in right now are about clarifying why it is that Olivia is so important to the FBI and understanding why Olivia specifically – not any other cop – got chosen for that job.”

Fringe screens every Sunday night on Sky1 at 10pm.