This week, Leonard Nimoy will be heard on The Big Bang Appearance in an episode titled The Transporter Malfunction.
Nimoy will be voicing his most famous character, Mr. Spock.
In The Transporter Malfunction, Penny (Kaley Cuoco) buys Leonard (Johnny Galecki) and Sheldon (Jim Parsons) Star Trek collectibles. Sheldon accidentally breaks his Mr. Spock Trek collectible and is haunted by Mr. Spock.
The Transporter Malfunction will air Thursday at 8 PM on CBS.