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It's Always Sunny in Philadelphia

S3E10 — Mac is a Serial Killer

- What the hell are you doing? - I'm spying.

And I got good news. I know the killer is Mac.

- I just realized something. - What?

- I know who the killer is. - You do?

It's Always Sunny in Philadelphia
Season 3, Episode 10
Mac is a Serial Killer
Image #287

I got hard evidence. I got a confession from his mother.

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- What the hell are you doing? - I'm spying.

And I got good news. I know the killer is Mac.

I got hard evidence. I got a confession from his mother.

- I just realized something. - What?

- I know who the killer is. - You do?