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Kim Hunter was an Academy Award winning actress.
This episode aired on TVLand's first night of operation.
The Intertect Building is located at 3470 Wilshire Boulevard. At the time it was know as the Tishman Plaza Office Building.
This is the first episode of Mannix, that deals with Nazi hunters and war criminals.
First episode that deals with Anthrax
This is the first episode that Mannix, speaks Armenian from his descendance and cultural background. Without subtitles.
This is the only episode of Mannix that brothers Joseph and Frank Campanella appear together. Consequently Frank Campanella, appeared in 3 more episodes on Season 2 and 3 as Lt. Dave Angstrom.
The U.S. and Mexican Border, was filmed in the San Ysidro Border Crossing.
Walter Koenig who guest starred in this episode was known for the role of Ensign Pavel Chekov on the series "Star Trek".
Ted Cassidy who guest starred in this episode was known for the role of Lurch on the series "Addams Family".
First episode that makes reference on why Mannix quit from Intertect:
Mannix While talking to Jody (whose Deaf)
" Well one day I got fed up and I, uh, cussed at the machine.
I think I heard it cuss back, so I quit."
The second season introduction of Mannix, uses footage from the episode "To The Swiftest, Death".
This is the first appearance of Gail Fisher as Peggy Fair, Mannix new assistant.
Joe Mannix's ride was a dark green 1968 Dodge Dart GT convertible.
Last appearance of Martin Braddock as Intertect employee Parker.
The first episode that Peggy mentions her son Toby and talking to him on the phone.
When Jill Ireland appeared in this episode she was already married to actor Charles Bronson.
When Mannix finds Celia's necklace tied to his steering wheel he unties it. The following close-up shows it still tied to the steering wheel.
Although Ward Wood portrays his usual recurring character of Lt. Art Malcolm, he is credited as "Lt. Kramer," the recurring character played by Larry Linville.
The home of Phil and Kathy Graves is the same interior set used for the home of "The Brady Bunch," another Paramount series.