Another Smallville question???

Question

What episode does Chloe find out about Clark's secret? Name and season please!

Answer 1

I think it's;

Pariah

Episode Number: 78    Season Num: 4  

Answer 2

I'm fairly certain it's Season 4, Episode 12 'Pariah'

I've only seen season 4 of Smallville - because Jensen Ackles was in that season - how shallow am I???? ; )

Pariah   First aired: 2/2/2005  

When a mysterious killer strikes at both Lana and Jason, Alicia is the leading suspect and even Clark comes to doubt her innocence. Feeling betrayed, she secretly tricks Clark into revealing his powers in front of one of his friends. And Genevieve returns to town with an offer for Lex, who in turn has an offer for Jason.

Writer: Holly Harold

Director: Paul Shapiro

Guest star: Jane Seymour (Genevieve Teague), Camille Mitchell (Sheriff Nancy Adams) , Erica Durance (Lois Lane (uncredited)), Sarah Carter (Alicia Baker), Derek Hamilton (Tim Westcott)

Answer 3

well is the 12 episode of the 4 season and is called pariah, that is when she finds about  clarks secret, but when he finds out that her knows of here secret, is in the 1 episode of the 5 season and is called arrival