Oh? I'm intrigued by this.
Ok, I got by the library today and the lost Desilu pilots and specials book was still there.
The precursors of “Mission: Impossible” chapter is only three pages long. It first describes the 1965 treatment titled “Briggs’ Squad: A Beginning” written by M:I creator Bruce Geller. Lt. Col. David (not Daniel) Briggs. His agents: Albert Key, a wheeler dealer; Jack Smith, a ladies man; Barney Collier, with graduate degrees in bio-electro chemical engineering, permutative mathematics, and micro-physics, and a ballistics expert; Willy “Arm” Armitage, ugly, ill-educated, strongest man in the world; Little Terry Targo, soft-spoken master at all forms if hand-to-hand combat and a hitman; and Martin Land, the master if disguise. When the M:I pilot was made only Briggs, Collier, Armitage, Targo, and Land (now Roland Land) appeared, plus addition of Cinnamon Carter. Terry Targo was only in the pilot.
Then it describes two other Desilu pilots prior to this that bore similarities to the M:I format. The first being “Man With 1,000 Faces”/“The Man Nobody Knows”, a project intended for syndication. Created by Hendrik Vollaerts. A “super-investigator” working out of Washington, D.C. Would have starred Steve Peck as the investigator, but Peck would have opened and closed each episode. Like Roland Hand, character would have donned make up at beginning of episode and taken it off again at the end, allowing other actors to play character in disguise for most of episode. Began development in 1957, pilot shot on 1959.
Then there was “Trio”, about the adventures of three ex-Army friends, an engineer, a lawyer, and a doctor. They get together to help individuals and also governments in trouble. There is a 1958 pilot script by Ed Adamson. After a year passed, Martin Leeds tried to get the project going again in January 1959 but it was soon dropped again.
Lastly, the chapter talks about “the real precursor of Mission: Impossible”, a short-lived series made by Filmways in the late 1950s titled “21 Beacon Street”. A team of operatives who devised elaborate schemes to catch criminals. Created by Leonard Heideman. There is a rather long side story about how Heideman had a psychotic break, stabbing and killing his wife. He eventually pled not guilty by reason of insanity (after spending spending fourteen months in a state hospital). Once the hospital testified that he had recovered from his psychosis, he changed his name to Laurence Heath and wrote a book about all of this. He subsequently scripted episodes of “Mission: Impossible”. Filmways sued Bruce Geller, claiming “M:I” resembled “21 Beacon Street” because of its emphasis on gadgetry and a team of experts. Geller claimed to have not have seen “21 Beacon Street” but paid Filmways off anyway to settle the suit.