In an interview with The Toronto Sun, the actor has revealed that he is now leaving acting behind and will not be returning as Spock in the future. "I want to get off the stage. Also, I don't think it would be fair to Zachary Quinto."
As for his thoughts on his successor in the role of the USS Enterprise's Vulcan first officer he said, "He's a terrific actor, he looks the part, and it's time to give him some space. And I'm very flattered the character will continue."
Nimoy went on to say that his retirement will also mean that he'll be cutting back on appearances at conventions and fan events.