The Herb Garden Germination - S4-E20
Revealing mistake: Sheldon's laptop has gone through several strange transformations throughout the series, but in this episode it takes the biscuit - it appears to be a Dell XPS with the back covered up, but the shot of Sheldon chatting only to Amy shows a Mac keyboard, with the laptop running OS X.
Chosen answer: That seems to be an error in the subtitling of the episode. What Marvin actually says is: "I may just be a menial robot, but I'm far too intelligent to expect to think of me for a moment... far too intelligent..."
Sierra1 ★