The Killer Robot Instability

Summary
Howard builds a robot called MONTE to enter into the Robot Fighting League. When Penny tells Howard what she really thinks of his sleazy come-ons he is hurt and doesn’t go to work for two days. She goes to apologise and cheer him up but ends up punching him when he tries to kiss her. Meanwhile Sheldon gets caught up in some trash talking with fellow Robot designer Kripke and ends up agreeing to a one-on-one fight with his robot. MONTE gets destroyed.

Critics
"A passable episode. Both plots feel very predictable and there isn’t enough comedy to compensate." - The TV Critic's Review