Excited for Fringe‘s season finale tonight? Leonard Nimoy previews William Bell’s agenda and discusses a possible season 5 return! Beware of spoilers.

Nimoy has spoken to E! Online about his surprise return as William Bell. He says:

The character of William Bell started out to be rather [ambiguous]. We weren’t quite sure whether we were supposed to enjoy him or be afraid of him. At the end of the last season he seemed to come around to be less dangerous. This season, I think things have taken another turn—he’s in another universe and has taken on other characteristics.

As for his role in tonight’s episode, Nimoy teases:

You’re going to see some interesting activities on the part of William Bell. This character has gotten himself out on a limb and is doing some wonderfully theatrical and bizarre activities. He has become a world of his own. Take that as a hint.

Finally, he is asked about whether he could potentially return for Fringe‘s fifth and final season, and although he was supposed to retire, the actor is very much open to another appearance! He says:

It will depend on my schedule [and] what they have in mind for the character, but we’ll be talking. I’m a sucker for a good role. I think the writing is wonderfully imaginative, [and Bell] is a fascinating character. [And] it’s not just the role of William Bell, it’s the show. I think Fringe is a wildly imaginative show; the creators and the producers are very bright and very theatrical. I’ve never worked with a better company in my entire 60-year career.

That is certainly a great endorsement for the series! We are very happy that Nimoy has returned once more, and let’s hope scheduling allows him to return in season 5!

“Brave New World, Part 2” airs tonight at 9 PM EST on Fox.