Live long, prosper and boldly go where no Star Trek cast member has gone before--to a rival big-screen franchise.
This A-list Enterrprise crewman has just signed on for a small but key part in Michael Bay's upcoming sequel, Transformers: Dark of the Moon, unspooling July 1.
Who is it and what's the role?
MORE: Leonard Nimoy recovering beautifully after "minor" surgery
Why it's Leonard Nimoy!
The erstwhile Mr. Spock will voice the role of Sentinel Prime a forebear of Optimus Prime whose rickety robotic body morphs into a mighty fire engine during the final battle between Autobots and Decepticons set in Chicago.
So much for that retirement!
The 80-year-old Nimoy announced he was finished with acting after reprising his point-eared alter ego in J.J. Abrams' 2009 Star Trek reboot and his arc on Fox's Fringe, which ended last year.
Apparently he wasn't so hard to convince to unretire for Transformers. Nimoy is reportedly married to Bay's cousin and has a soft spot for the shape-shifting robot series, having voiced the role of Galvatron in 1986's animated film Transformers: The Movie.