Paul Stevens (Cicero Wolfe, the lawyer) suffered a stroke during filming of the courtroom scenes, forcing the producers to postpone the last days of filming for three weeks until Stevens recovered enough to talk. Stevens was partially paralyzed, and was propped up on a cart and filmed in close-up to hide the effects of his illness.
This two parter marks the 16th and 17th of eighteen times Morgan Woodward appeared on the series.
This two-parter is the only time Donna Mills was on the series.
Although Morgan Woodward plays an older character than James Arness, he is actually 2 years and 3 months younger.