Mr. Monk and the Sleeping Suspect - S2-E7
Character mistake: Brian Babbage is such a perfectionist and plans out such an elaborated plan for his crimes that it is very unlikely that he would simply leave the ketchup bottles sticking to the ceiling for the police to be found after he had timed the perfect glue for his plan. Plus, he even had staffers who already knew about the bottles and it would have taken him not more than a single order for the bottles to be removed. (00:23:50)