This episode won an Emmy Award for Outstanding Directing for a Comedy Series.
The "Montana" is a reference to the famous "Dakota" in New York City.
Carol Larkin (Rosemary Murphy ), portrayed as a lush, spills wine on her dress both in this episode and season 6's Taps at the Montana (1999).
The episodes gets its title from Harper Lee's novel "To Kill a Mockingbird". Rosemary Murphy, who guests in this episode, played the part of Maudie Atkinson in the 1962 film, To Kill a Mockingbird (1962).
Since first getting his dog in Season 3 "Chess Pains" (1996), this is the first time Niles (David Hyde Pierce) finally makes the realization that his dog bears a remblence to Maris.