The name of George Clooney's character is Scheisskopf. In German, "kopf" means "head" (in both the anatomical and hierarchical senses) and "scheiss" is a vulgarism meaning "feces" (and having the same colloquial meaning as the English word "shit"). So translated literally, "Scheisskopf" means "shithead," though that exact insult doesn't exist in German.
George Clooney claimed that all three directors including himself were present on set every day of filming every episode, and were together every day of post-production.
Two functioning B-25 aircraft were brought from the U.S. to Sardinia to be used in aerial scenes. More planes were added digitally in post production.
When asked about filming the sex scenes, Julie Ann Emery said "The sex scenes and nudity in Catch-22 were handled better than on any other set I have ever been on. And I think that is owed entirely to the #MeToo movement and awareness being raised. The inner set was shut down to a degree that I have seldom seen, and we could see where the monitors were so we could tell who was watching the screens. I also found out later that the producers requested that as many women working on production as possible be present on the larger sound stage to try to balance out the gender numbers, which definitely had a psychologically positive effect on me. Think of it this way, most sets are 75%-80% male. If you are a woman being asked to disrobe in an environment where there are so few women, it can begin by feeling like a hostile environment just by the sheer numbers alone... I was massively empowered by directors George Clooney and Grant Heslov. I was given great agency over my choices and my body. That was new for me. I was accustomed to a more aggressive environment on scenes of that nature. This felt more like, 'let's figure out what the shot is and what is physically happening so we can get down to the scene work.' It blew my mind a little bit. The scene work became much more interesting because the physical aspects were handled well and we were comfortable."
Most of the bombers shown are B-25s.