Arlene Martel (Athena) is known to fans of Star Trek: The Original Series as T'Pring, Spock's (Leonard Nimoy) bride. She also frequently starred as "Tiger" on "Hogan's Heroes" (1965).
David Opatoshu was a guest on Star Trek: The Original Series as Anon 7 in "A Taste of Armageddon."
This is the third of guest star Michael Tolan's three guest appearances, and the only one in which he plays an antagonist.