Ahead of its premiere, Frasier season 2 already creates a plot hole involving Freddy. Kelsey Grammer’s beloved snooty intellectual will soon return to the small screen for another round of adventure. The first 10 episodes of Frasier focused on establishing the character’s final act as he returned to Boston. Aside from wanting to redeem himself in his old haunt, another major motivation for Frasier to come back to Beantown was to re-establish his relationship with his grown-up son, Freddy. This was inspired by his own experience with fixing his fractured dynamic with his father, Martin Crane, in the original show.
https://screenrant.com/frasier-season-2-plot-hole-freddy-bulldog-reunion/