Friends (owned by Warner Bros. Television): Lisa Kudrow played the recurring role of Ursula, a flaky waitress at Riff's Bar, a local restaurant that Paul and Jamie frequented. Kudrow went on to star in the NBC sitcom Friends, playing the also somewhat flaky character of Phoebe Buffay, and for a time both series shared the same Thursday night line-up. While not originally intended, the characters of Ursula and Phoebe were later found to be identical twin sisters. In a Friends episode ("The One With The Two Parts", 1st Season), as part of a night of NBC sitcom crossovers, Jamie and Fran walk into Central Perk and mistake Phoebe for Ursula. Hunt and Kenzle were not identified on screen as Jamie and Fran. In the season three episode "Pandora's Box", Jamie causes a citywide power blackout in New York City, and the effects of the blackout are seen in the Friends episode, "The One with the Blackout", and there was also a blackout in the episode "Birthday in the Big House" of the short-lived NBC sitcom Madman of the People, which leaves open the possibility that the characters from this program may also exist in the same universe as the characters of Mad About You. All three episodes originally aired during the evening of November 3, 1994, alongside a Seinfeld episode which did not incorporate the blackout premise.