What happens when a 'Columbo'-ish detective investigates a murder in an apartment that looks exactly like the one on 'Seinfeld?' And what happens if he doesn't own a TV and doesn't understand 'Seinfeld' references? 'SNL' has the answer.

'It's Always Sunny in Philadelphia' star Charlie Day plays plays this man-living-under-a-rock who, furthermore, doesn't get references to baseball or World War II either.

'Seinfeld' fans will want to check out this fun parody below.

[via Saturday Night Live]