According to the plane tickets seen in the airport scenes, the story takes place in Baltimore.
Peter Graves stated that he considered this show, from an intellectual standpoint, the best ever of the series. As the duel between the brilliant minds of Miklos and Phelps weave against each other to drive the plot.
Vic Perrin played roles in three other "Mission: Impossible" shows, and was also credited as a voice in seven shows.
Steve Ihnat played his role to absolute perfection with a penetrating countenance, precise physical movements and contempt for those around him. But in the closing scene, as Phelps is listening via the transmitter in Townsend's collar, he displays curious emotion at feeling sorry for the mastermind of the "failed" ploy because he "lost".