Le avventure di Jet Jackson

Does anybody remember what kind of plane Captain Midnight flew in the 50's show? They used to identify it in the closing credits--as I recall it was a Douglas aircraft. I barely remember the show from it's run as "Captain Midnight". I watched it quite a bit when it was syndicated as "Jet Jackson".

Looking back, the convenient appearances of Secret Squadron members whenever and wherever Captain Midnight got into trouble was pretty contrived. I remember an episode where the Captain and Icky were locked in a basement. A sweet little old lady was toddling by, saw them through the window, reached into her little bag, and pulled out her Squadron communicator to call SQ 3. From the perspective of the paranoid 21sr century it seems sort of creepy. Loved it at the time, though.