Monk Easter Egg - End Credits Song

In the episode where Monk is investigating the murder of an actors ex-wife, the actor plays a detective not unlike monk himself.

One of the actor's obsessed fans is trying to get a petition through to the network to bring back the old theme song as the new one "sucks"

At the end listen closely and you will hear the old theme song to monk playing instead of "it a jungle out there" instrumental.