" The One with Two Parts (1) " is the 16th episode of the first season of the sitcom Friends , which originally aired on February 23, 1995. The episode features several interconnected storylines involving the main cast:
: Phoebe discovers that her twin sister, Ursula, is dating Joey. This creates tension as Phoebe worries about Joey getting hurt by Ursula, who is notoriously flaky and inconsiderate. 16. The One with Two Parts (1)
: Ross attends Lamaze classes with his ex-wife Carol and her partner Susan, where he struggles to find his place in the "birthing team". " The One with Two Parts (1) "