[s2e12] The Killer Robot Instability [ 1000+ TESTED ]

: The "instability" of the title refers as much to Howard’s mental state as to the robot. After Howard makes an inappropriate advance, Penny snaps, telling him he will "grow old and die alone" because he is "creepy". This sends Howard into a deep depression, leading him to hole up in his bedroom and miss the robot battle.

S 2 E 12 The Killer Robot Instability Analysis. : r/bigbangtheory [S2E12] The Killer Robot Instability

Johnny Galecki, Jim Parsons, Kaley Cuoco, Simon Helberg, Kunal Nayyar : The "instability" of the title refers as

: Leonard guilt-trips Penny into apologizing to Howard. When she does, Howard attempts to take advantage of her kindness by going in for a kiss, leading Penny to punch him in the face. Notable Firsts and Trivia [S2E12] The Killer Robot Instability