Episodes 17–24

17. The One with Two Parts, Part 2

Chandler flirts with and nearly kisses Ursula, mistaking her for Phoebe. Rachel and Monica continue the hospital identity swap, flirting with two doctors, until the nurse announces the baby is a boy and the sisters blow their cover in an argument. Phoebe confronts Ursula about how she treats Joey.

Notable dialogue:

• Chandler — The "I thought you were Phoebe" confusion and abrupt embarrassment.
• Nurse — "It's a boy."
• Rachel and Monica's secret-dumping argument in front of the doctors.

18. The One with All the Poker

The men and women play poker, with the women getting a strategy lesson from Aunt Iris. Rachel loses her shot at a job at Saks, then channels her frustration into the game. Ross cheats by taking a card from the ceiling, and Rachel kisses him to distract him — and wins the hand.

Notable dialogue:

• Monica — "Let the horses run."
• Ross's card-from-the-ceiling cheat.
• Rachel kissing Ross to make him fold.

19. The One Where the Monkey Gets Away

Rachel loses Marcel while watching him, and the group stages a frantic city-wide search. Rachel also learns Barry is engaged to her former best friend Mindy. An old school acquaintance, Animal Control officer Luisa, complicates the search.

Notable dialogue:

• Marcel's escape and the panic it causes.
• Joey's "stuck in a box" visual gag.
• The Barry and Mindy engagement reveal.

20. The One with the Evil Orthodontist

Rachel falls back into Barry's orbit: they end up having sex in his dentist chair while he is engaged to Mindy. Mindy asks Rachel to be her maid of honor, leading to a confrontation where Rachel admits the truth — and Mindy marries Barry anyway. Joey loses his health insurance.

Notable dialogue:

• Rachel — "We ended up having sex in his chair."
• Chandler — "I got her machine."
• Chandler — "I feel violated. And not in a good way."

21. The One with the Fake Monica

Monica discovers someone has stolen her credit cards — a woman named Dana living a more exciting life. Instead of turning her in, Monica befriends "Fake Monica," who ends up arrested but helps Monica rethink her life. Joey auditions to play a 19-year-old; Ross prepares to give Marcel away.

Notable dialogue:

• Monica — Introducing herself at tap class as "Monana."
• Monica thanking Dana in jail for the wake-up call.
• Joey's 19-year-old audition and Chandler's unhelpful stage-name advice.

22. The One with the Ick Factor

Monica dates Ethan, believing he's a college senior, and sleeps with him — then learns he's actually a high-school senior. Rachel has an erotic dream about Chandler (and later Joey). Ross, waiting for Carol to go into labor, is plagued by wrong pages before the real one comes.

Notable dialogue:

• Ethan's reveal that he's a virgin, then that he's a high-school senior.
• Rachel's dream about Chandler, which drives Ross's jealousy.
• Ross's pager chaos ending with Carol going into labor.

23. The One with the Birth

Carol goes into labor and gives birth to Ben. Ross and Susan bicker through the delivery; Phoebe locks them in a closet to force a truce. Rachel flirts with Carol's OB/GYN, and Joey helps a pregnant woman give birth.

Notable dialogue:

• The reaction beat — "Oh. My. God."
• The baby's name — "Ben."
• Phoebe's closet intervention to stop Ross and Susan fighting.

24. The One Where Rachel Finds Out

Rachel opens Ross's birthday gift — an antique pin from her childhood — and realizes how much he cares. Chandler accidentally reveals that Ross is in love with Rachel while Ross is already on a flight to China. Rachel races to the airport, but he has already left.

Notable dialogue:

• Rachel — "Oh, my God! He remembered!"
• Chandler — Accidentally revealing Ross is "in love with" Rachel.
• Rachel choosing to give Ross and her a chance even though he's gone.

Note: "I got off the plane" belongs to the series finale, not this episode.