This episode was filmed at the Serra Retreat in Malibu, California, a Catholic retreat and conference center operated by Franciscan Friars since 1943. It is open to the public Monday through Friday but by appointment only on weekends.
This is the last of 3 appearances in the series by Dick Foran. Dick Foran played Perry Mason's wrongly accused client all 3 times.
Perry Mason (Raymond Burr) interrogates Arthur Hennings (Ronald Long) on the stand. Eight years later, Long would appear on Get Smart (1965), in the episode Leadside (1969), as the wheelchair-bound title villain, a parody of Burr's post-Mason Ironside (1967) character.