Captain Stottlemeyer: It's not Linda. She was 30 miles away. It was this woman we're holding, Helen Hubbert. Weren't you listening? She has no alibi!
Adrian Monk: Then it can't be her.
Captain Stottlemeyer: What the hell are you talking about?
Adrian Monk: Think about it. That night, the killer was hiding in the bathroom. She could've shot Corcoran any time. But she didn't. She waited. Why? She needed a witness.
Captain Stottlemeyer: I don't have to listen to this.
Adrian Monk: Yes, you do! Leland, you're a cop. Look at it like a cop. Leland, the killer needed a witness to confirm the exact time of the murder. Why? There's only one possible reason. The killer had an airtight alibi for 7:20.
Captain Stottlemeyer: Now, wa- Because Helen Hubbert does not have an alibi, it means it couldn't be her?
Adrian Monk: That's right.
Captain Stottlemeyer: Her not having an alibi clears her?
Adrian Monk: That's right. It's the best alibi of all.
Captain Stottlemeyer: I am so glad we're not talking. I'm 51 years old. She's the last chance I have.
Adrian Monk: She's the guy.