Chandler and Joey meet Ursula, Phoebe's twin sister; Joey begins dating Ursula, but that bothers Phoebe, who doesn't get along with her sister very well. Ross attends Lamaze class with Carol and Susan; Carol isn't sure she can go through with the delivery; Ross realizes he's really going to be a father. Chandler can't bear to fire an employee he's attracted to, so he starts to date her and tells everyone else she's mentally unbalanced, so it isn't safe to fire her; she begins to notice people treating her oddly, so Chandler has to come clean. Ross has trouble controlling his monkey, Marcel, who switches Monica's TV into Spanish mode; no one can figure out how to switch it back. Mr. Heckles could have cats. Jamie and Fran (from Mad About You) make an appearance in Central Perk. Rachel finally gets around to taking down the Christmas lights, but falls off the balcony in the process, and ends up hanging upside down outside Mr. Heckles' window.

Original air date: 23 february 1995

Written by: Marta Kauffman & David Crane
Director: Michael Lembeck

Guest stars
Dorien Wilson as Mr. Douglas
Jane Sibbett as Carol
Jessica Hecht as Susan
Larry Hankin as Mr. Heckles
Jennifer Grant as Nina
Michele Lamar Richards as The Lamaze Instructor
Leila Kenzle as Fran Devanow
Helen Hunt as Jamie Buchman
Patty Tiffany as Woman

[ NOTES: Helen Hunt and Leila Kenzle cross over in their roles from Mad About You. Lisa Kudrow also plays the role of Phoebe's identical twin sister, Mad About You's Ursula Buffay, for the first of many times.
This episode runs 23:22 on DVD (a typical sitcom runs about 22:00). ]