The Big Bang Theory Episodes :- The Killer Robot Instability

In Season 2 Episode12 Penny’s comments about Howard’s love life send him into a depressing trance makes his friends anxious about losing their best team member for an upcoming fighting robot competition. Sheldon is challenged by their co-worker, Barry Kripke for a one on one fight between his robot and Sheldon’s M.O.N.T.E. Leonard calls in an old favor due on Penny and asks her to apologize to Howard and try to get him back on their team. On reaching Howard’s home, to apologize, Penny ends up hearing all about his dating history and advices him not to try so hard to get his girls. This results in a comforted Howard trying to kiss Penny that she answers with hard punch in his face. Meanwhile, M.O.N.T.E. loses in the fight and suffers irreparable damage. Later, when Sheldon organizes a watch for M.O.N.T.E., Penny remarks about it being just a toy robot, the episode ends with a sulking Sheldon going into his room.