Leonard Nimoy in Tears

He may play the unemotional, hyper-logical Dr. Spock, but Leonard Nimoy found himself constantly fighting back tears on the set of J.J. Abrams’ new Star Trek film.

Nimoy reprises his role of the iconic Vulcan and admits he was a blubbering mess as he watched characters from the original 1960s TV series meeting for the first time in the new prequel.

The scene he struggled with the most was when Captain Kirk, played by Chris Pine, met Karl Urban’s Dr. McCoy for the first time.

DeForest Kelley, who played the original McCoy and died 10 years ago next month, was a longtime friend of Nimoy’s.

He tells TV Guide Magazine, "I started crying - and it still moves me now. I loved D-Kelley, salt of the earth.

“I cried a lot watching this production.”

The ghosts of friends past.

Star Trek opens May 8th.

—Sasha Perl-Raver