Frasier introduced Martin Crane as Frasier’s much-loved father despite Cheers having previously established that Frasier’s father was dead, creating a clear continuity problem between the two sitcoms. The article argues that a major crossover episode later repaired this inconsistency by revisiting Frasier’s past and providing an explanation for the earlier claim.

The issue mattered because Frasier was a high-profile spin-off of Cheers, and Martin, played by John Mahoney, became central to its success. Frasier ultimately ran for 11 seasons from 1993 to 2004, matching Cheers’ length, while another Cheers spin-off, The Tortellis, lasted only 13 episodes.