Will & Grace - Season 4 - Eps 16: A Chorus Lie
Matt Damon makes a guest appearance as a clever charmer named Owen, who's competing against Jack for a spot in New York's Gay Men's Chorus. Truth be told, however, Owen is totally straight and is really after the group's big perk: a summer trip to Europe, all-expenses paid. Jack suspects Owen's ruse but needs proof. How about the hug test? Now a flustered Jack reluctantly turns to Grace to ""in"" Owen. Meanwhile, a scheming Karen tries to pass off an unwitting Will as her lover and not her lawyer when she discovers that she's the object of pity for being single at her own Valentine's Day party
About Will & Grace

Title: Will & Grace
First Air Date: 1998-09-21
Last Air Date: 2006-05-18
Status: Ended
Rating: 6.8/10 (from 499 votes)
Language: EN
Seasons: 9
Total Episodes: 194
Network: NBC
Genres: Comedy
Production Companies: NBC Studios, KoMut Entertainment, 3 Sisters Entertainment, Universal Television
Synopsis
Will Truman and Grace Adler are best friends living in New York, and when Grace's engagement falls apart, she moves in with Will. Together, along with their friends, they go through the trials of dating, sex, relationships and their careers, butting heads at times but ultimately supporting one another while exchanging plenty of witty banter along the way.
Cast

Eric McCormack
Will Truman

Debra Messing
Grace Adler

Sean Hayes
Jack McFarland

Megan Mullally
Karen Walker