"The One Hundredth" is the third episode of the fifth season of Friends, the hundredth episode in total. It aired on NBC on October 8, 1998. Phoebe has finally gone into labor and her friends rush her to the hospital.
Phoebe, Rachel, Joey, andRoss arrive at the hospital, where Phoebe tells the nurse at the desk that she’s in labor. The nurse asks which of the two men present is the father, but Phoebe tells her the father is her brother. Rachel says she is really going to miss watching Phoebe freak people out like that. Joey has a video camera and is making a video for the babies to look at some day. He asks Phoebe if there’s anything she’d like to say to the triplets before it all starts, and she begs them not to hurt her.
Monica and Chandler arrive, quite awhile after everyone else. The others don’t understand what took them so long; their cabs left at the same time. Monica and Chandler obviously made a romantic pit stop, but they try to cover their tracks by saying that Monica had to go back to the apartment because she forgot her jacket. This might’ve worked, except Monica still isn’t wearing a jacket.
Dr. Harad comes in and comments that Fonzie once dated triplets. Chandler asks who Fonzie is, and Dr. Harad confirms that he is indeed talking about Arthur Fonzarelli, the Happy Days character. He appears to have an unhealthily strong obsession with the character which seems to be making him "love drunk" and after he has left, Phoebe demands that Ross go find her a different doctor.
Chandler runs into Monica out in the waiting room, and she starts to tell him about what happened with Rachel and the nurses. Before she can finish, Chandler interrupts; he clearly assumes Monica is going to go out with the nurse and tries to save face by telling her he's fine with her dating the nurse, that he and Monica are nothing, they're just “goofing around.” Monica says she was going to try and get out of the date, but if Chandler thinks they’re just “goofing around,” maybe she will go on the date after all. Joey comes in off the elevator, having just bought a few things in the gift shop, when he is hit with his third bout of pain.