Sharona: I don't understand.
Natalie: Neither do I. Just do it again and slow down.
Adrian Monk: God. It was Walsh's idea. He came to your uncle. He said he had a plan to rip off the country club. Howard would pretend to fall down the stairs. Walsh would be the unimpeachable witness. They'd sue the club and make a fortune. Walsh must have known Howard was broke. He knew he'd take the bait.
[Monk tries to leave the closet, but is stopped by Sharona]
Adrian Monk: Okay. Where was I?
Natalie: He took the bait.
Adrian Monk: That morning, your uncle was on the green. He was in position. Meanwhile, Walsh made sure he and the caddy were close enough to see it. Your uncle thought it was just another scam, but Walsh had other ideas. Can we at least open the door just a crack?
Sharona: Keep going.
Adrian Monk: The caddy ran off to get help. That left Walsh alone with your uncle. It was a perfect plan, two witnesses. Walsh himself and his caddy had seen your uncle fall down those stairs. Nobody would ever suspect it was murder, the end. Can we open the door? [Perry opens the door] Hey, we were just taking a little tour. Is this oak?
Natalie: Mr. Monk, he knows that we know.
Perry Walsh: I think we're done here.