This is an adaptation of Erle Stanley Gardner's novel "The Case of the Counterfeit Eye." However, a glass eye would've been too gruesome for 1950s television, and so a toupee was substituted.
This show was meant to be shown in season three. William Talman got fired on morals charges and this show had already been filmed and shown at this time.
In March of 1960 William Talman made headlines when he was arrested during a police raid of an alleged "wild nude party" being held at the home of an acquaintance, Richard Reibold. The incident caused CBS to invoke a morals clause in his contract that cost him his job on "Perry Mason." The charges were eventually dropped after a trial that was closely followed by the newspapers and sensationalized by the tabloids. Talman always maintained his innocence, and following the trial the judge in the case criticized the police for arresting him. He remained off the show until December of 1960, when CBS reinstated him after a flood of fan mail from supporters.
This is one of Mason's rare cases where there's no courtroom confession