The Cruciferous Vegetable Amplification

"The Cruciferous Vegetable Amplification" is the second episode of the fourth season of The Big Bang Theory that first aired on CBS on September 30, 2010.

The episode features a guest appearance by Steve Wozniak, co-founder of Apple Inc. Sheldon attempts to calculate when he will die, and estimates that he has 60 years to live.

He concludes that he will miss "the singularity", a point in time in which technology will be advanced enough for him to transfer his brain into a machine and achieve immortality.

As a result of his failed attempts to have a healthier lifestyle, Sheldon creates a "mobile virtual presence device": a robot (a Willow Garage Texai remote presence device[2]) which will replace him, performing his normal tasks while controlled by Sheldon from his bedroom.

[7] The TV Critic rated the episode 56 out of 100, stating that "the story is a solid idea" but that the writers were "overloading on Sheldon jokes".

Club complimented the scene in the car, saying that Parson and Galecki's "chemistry was used to its fullest extent" and praising the inventive uses of the presence device.