Broadcast
The first season of the show premiered on ABC on April 13, 2011, and concluded on May 25. The premiere aired at a special time at 9:31 pm after Modern Family and was followed by another episode in the show's regular timeslot at 10 pm. The show was originally set to air a single episode each week that followed, but ABC decided to air a fourth episode immediately after the third episode on April 20, 2011, at 10:30 pm. On April 29, 2011, it was announced that the show would air two episodes a week for three weeks at 10 pm and 10:30 pm beginning May 4, 2011.
The season also aired mostly out of the intended broadcast order to make the initial episodes more "stand alone" in an effort to get more people invested in the show. As a result, the episodes "Bo Fight" and "Barefoot Pedaler", which were intended to air as the second and third episodes as they show the events in the weeks after Alex and Dave's wedding, aired as episodes 10 and 11. It was later revealed that the decision to air the episodes out-of-order was ultimately made by ABC. The episodes later appeared in the intended order on the DVD release.
The episode "Why Can't You Read Me?" was initially left unaired, however it later aired on August 24, 2011.
The second season of the show premiered September 28, 2011, and ended on April 4, 2012. The season saw the show move to the 9:30 pm timeslot, previously occupied by Cougar Town. The show then left the schedule to make room for Don't Trust the B— in Apartment 23.
Despite picking up the show for a full 22-episode second season, the 21st episode to air was labeled as the season finale by ABC as they needed to premiere Don't Trust the B— in Apartment 23 on April 11, 2012. The episode, titled KickBall 2: The Kickening, later aired on E4 in the UK on May 17, 2012, and also aired in other international markets, despite the episode officially being held until the third season. Additionally, the episode was excluded from the second season DVD.
The third season of the show premiered on October 23, 2012, and ended on May 3, 2013. The season saw the show move again, this time to the Tuesday at 9 pm timeslot, where it aired immediately after Dancing with the Stars.
The first six episodes of the season aired in Canada on City, two days prior to the American broadcasts airing on ABC. KickBall 2: The Kickening, an episode from season two that previously did not air on ABC, made its debut as part of the third season on ABC and City on January 13, 2013, despite having aired internationally as part of season two.
On December 4, 2012, ABC announced that on Tuesday, March 26, 2013, Dancing with the Stars would re-take the Tuesday 9 pm hour, leaving the fate of unaired episodes unclear. On December 21, 2012, ABC announced that new episodes of both Happy Endings and Don't Trust the B— in Apartment 23 would replace the cancelled drama 666 Park Avenue for three weeks on January 6, January 13, and January 20, while maintaining its current timeslot. Only two of the three scheduled episodes aired in the Sunday timeslot.
On January 22, 2013, ABC announced that it had removed Don't Trust the B— in Apartment 23 from the schedule and would instead air back-to-back Happy Endings concurrently on Tuesdays, but it was removed from the timeslot after episodes 12 and 13 aired. However, on February 13, 2013, ABC announced that, starting March 29, the series would move to Fridays at 8 pm ET/PT with back-to-back original episodes.
On April 19, 2013, ABC preempted its primetime programming in favor of coverage of the manhunt for Dzhokhar Tsarnaev and Tamerlan Tsarnaev, after the Boston Marathon bombing, pushing back the season finale date to May 3, 2013.
