For the sixth season's finale, David E. Kelley filmed two different endings. One in which Lindsay Dole was found not guilty, and one in which she was found guilty. Even the cast didn't know which ending it would be until it was aired.
The first season featured episodes that were shot in conjunction with David E. Kelley's other hit lawyer show Ally McBeal (1997). The show portrayed each practice as opposing counsel on the same case. Both shows reflected the point of view of the court from different sides.
The cast filmed the season seven finale thinking it would be the series finale, because ratings had taken a dive during season seven after its new time slot. However, at the last minute, ABC renewed the show.
For the third season, Lara Flynn Boyle, Camryn Manheim, and Holland Taylor received Emmy nominations as Supporting Actresses. Flynn Boyle and Manheim did the whole season but one episode, always credited as regular cast members. Taylor, who eventually won, did six episodes as a Special Guest Star.
The old courthouse at Pemberton Square, seen in most of the exterior shots of the cases the firm tries, is the courthouse for the Boston Municipal Court, and would not be the actual courthouse used for the most part in the cases seen in the series; federal cases are now tried at the modern facility at Fan Pier in South Boston, and superior court cases at the McCormack courthouse in the financial district.
The first season had actually thirteen episodes, but the network only aired six, and merged the remaining seven with those on season two, which is why the second season is so long. This mistake was corrected on the DVD box of the first season, and when the show aired in other countries, like Spain.