President Truman persuades Blackhawk to sign up with the CIA to do covert operations. In Germany, a Nazi organization is trying to recover a secret formula captured by the Allied military. Blackhawk Airways is moved to the States. The female leader of the Nazis impersonates Constance Darabont, owner of a large chemical company. The Blackhawks escort the real Darabont to Germany, where she is promptly replaced by the impersonator. The fake Darabont takes Prohaska to bed. On the flight back to America, she spikes the team's coffee with the "secret formula," LSD. She bails out while the crew halucinates. The Blackhawks recover in time to avoid crashing, land at the secret Nazi island base, kill the female leader and recover the formula. This was the last Blackhawk story in Action Weekly. I liked the first story (by Grell) better than Pasko's. The latter turned too quickly to the paranoic conspiracy nonsense that spoiled the Blackhawk series that followed.

Note that #633 has a neat cover in a style similar to Military Comics #42 and Blackhawk #261, but instead of F5F-1 Skyrockets, the Blackhawks are flying Lockheed P-38 Lightnings!