Horizon 1980 Episode 3 Cleared for Take-Off ( Air Date 1980-02-04 ) Genre Documentary category. Overview "Documentary which looks at the danger points in flying an airliner on a routine flight from Gatwick to Los Angeles. Danger points are identified and we see research into airtraffic control, aircraft design, the role of the stewardess, avoiding mid-air collisions, electronic flight desks, whirlwind vortices and a new fuel additive that may virtually eliminate the instant conflagrations.".