This is the only episode of Season Three in which Barton MacLane (General Martin Peterson) appears. His previous appearance was in the Season Two episode A Secretary Is Not a Toy (1967).
Although the series often referred to authentic, real-life NASA programs and bases (such as the Mercury program and Nellis Air Force Base), the Trailblazer program that is to send Tony into space did not exist. More than 30 years later, NASA did have a Trailblazer mission - but it was to test payloads (cargo) and never carried humans.