Magnum is introduced to both Lt. Tanaka and Doc Ibold for the first time in the series.
While Magnum states his date of birth as August 8, 1944, this was contradicted in Memories Are Forever (1981) where his date of birth is shown as January 5, 1946 on his drivers license, and again in Murder 101 (1984), where his DOB is again listed as January 5, 1946 on his PI license. Additionally, in the series finale Resolutions: Part I (1988), he visits Virginia for his birthday and the weather is shown as being cold, which is consistent for January not August.
First appearance of Glenn Cannon as Dr. Ibold, who would become a reoccurring character in the series. He previously appeared as Dr. Bernard Kessler in Season 1 "Never Again... Never Again" (1981).
The Krugerrand used by Higgins to hypnotize Thomas was worn by 'Paulo', Lady Ashley's traveling companion, in "Computer Date".
Magnum gives his birth information as August 8, 1944, in Virginia. This makes him slightly less than six months older than Tom Selleck, who plays him.