Episode 1.3: Wedding

The guys are invited to a wedding, and Nick is fearful that he’ll run into his ex (Mary Elizabeth Ellis), so he asks Jess to be his date. Meanwhile, Winston takes his role as usher very seriously, and Schmidt catches the eye of two women (Katie Cassidy, Natasha Lyonne).

Original Air Date: Oct 4, 2011

Guest Cast:
Natasha Lyonne: Gretchen
Mary Elizabeth Ellis: Caroline
Katie Cassidy: Brooke

- description from tvguide.com