During testimony of John Gifford, Perry brings up a piece of paper and lays it down on the witness stand at the beginning of his cross examination. During John Gifford's testimony, Perry takes the paper away. Camera cuts to others in (courtroom) audience. Then back to Perry and John Gilford and the paper is back on the stand, which Perry takes off a second time.
A twelve-year-old murder is committed with a Smith and Wesson Chiefs Special, a revolver not yet invented at that time.
Perry is shown driving onto the studio gate in his 1957 Ford Skyliner -- since this episode is from 1959, he had already been seen in previous shows driving both 1958 and 1959 Ford Skyliners. The shot was obviously re-used from the 1957 (first) season...