"Strangers on a Treadmill" is the fourth episode of the second season of the American sitcom, Modern Family and the 28th episode of the series overall. The episode originally aired on October 13, 2010 on American Broadcasting Company (ABC). The episode was written by Danny Zuker and directed by Scott Ellis. In the episode, Claire and Mitchell try to spare their significant others from embarrassment, Haley tries to teach Alex how to be cool while Jay tries to prove to Gloria that he knows his employees' names.