It's Always Sunny in Philadelphia (2005)

S3E11 Dennis Looks Like a Registered Sex Offender

Title: Dennis Resembles a Convicted Predator Plot: Dennis finds himself in a predicament when he’s confused for a recently paroled sex offender, but he’s more concerned about the man’s hefty physique than the crime itself. At the same time, Mac attempts to reconnect with his father, who has just come out of prison, but things take a strange turn when his father seems to show a peculiar interest in Dee.