Location: The courthouse is in fact Santa Monica City Hall which does have some court rooms. Submitted by Eric Cooper, 3/30/2009. Pictures here and here.

According to the IMDb, the real name of actor Dirk London is Ray Boyle. Submitted by gracep, 12/7/2010.

Although credited, Ray Collins (Lt. Tragg) did not appear. Submitted by gracep, 12/7/2010.

Both Harry Carey, Jr. and Pat O’Malley were regular cast members in Disney’s Spin and Marty series. Submitted by Masonite, 7/11/2011.

Word of the day: Perry Mason used the word “riparian,” which refers to river banks and/or adjacent wetlands. Submitted by gracenote, 7/12/2011.

Deliciously dapper David Gideon (Karl Held) delights us again with his carefully memorized detailings of legal doohickeys and, of course, his dandy dress and dazzling smile. Eight appearances down, one to go. Submitted by gracenote, 7/12/2011.

Character Names: Although Paul Fix is credited here only as “Prosecutor,” we know from Fix’s other four PM appearances that his character’s last name was always Hale, and his first name was either Jonathan (“TCOT Barefaced Witness”) or Darwin (“TCOT Angry Mourner”). He was mainly used when Perry would try a case outside of the city. Submitted by cgraul, 11/9/2011.