This is the ninth of eleven appearances Joseph Crehan makes in the series, each time playing a different character.
This is the second of six appearances Harold J. Stone makes in the series, each time playing a different character.
This is the first of only two appearances Vic Morrow makes in this series, appearing as a different character each time. His second appearance occurs in The Maggie Storm Story (1962) from season three. Within a year of his second appearance on The Untouchables (1959), he would star in his own series, which would run for five seasons: i.e. Combat! (1962).
This is the second and final of only two appearances Madlyn Rhue makes in this series, each time appearing as a different character. Her first appearance occurs in Head of Fire: Feet of Clay (1960) from season one. She is perhaps best remembered from the TV sci-fi series Star Trek (1966) as the romantic interest of Ricardo Montalban's Khan.