[s2e12] The Killer Robot Instability Site

: This episode marks the first appearance of Barry Kripke , played by John Ross Bowie .

: This is the first time Howard's mother speaks without shouting. Production Credits Director Mark Cendrowski Writers Bill Prady, Richard Rosenstock, Steven Molaro, Daley Haggar Starring [S2E12] The Killer Robot Instability

: 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. : This episode marks the first appearance of