Hergos is a character who makes a one-time appearance in the Season 2 episode titled "Flight 093 is Missing.
Hergos is the leader of the hijackers who hijack Flight 093. Shortly before take-off, he comes on board the aircraft dressed as a maintenance crew and plants a homing beacon inside a microwave oven in the galley.
When the aircraft has been brought down into the ocean, Hergos and his accomplice Joskins take a boat out to the crash site. Four other accomplices (unnamed) who were on board the aircraft and who did the actual hijacking have swam out of the aircraft in scuba gear and have made it to the surface, to meet the boat. Unfortunately for them, a Piper J-3 Cub aircraft flies over. Hergos decides that he cannot afford to let his location (and that of Flight 093) be discovered so he shoots the aircraft down with a FIM-43 Redeye SAM missile. Next he tells Joskins to machine gun all the fellow hijackers in the water so that there will be fewer people to share the ransom money.
Meanwhile, Airwolf's sensors have picked up the image of Flight 093 on the sea bed and this information is relayed to the Coast Guard. Joskins picks this up on radio and wants to get away quickly. However, Hergos tells him they need to first destroy the evidence. Divers who are sent down will find that four bodies are missing. They could be identified and this will lead back to Joskins and himself. Hergos tells Joskins to steer a course for the crash site and they begin to drop depth charges. They only manage to release one or two before Airwolf shows up. Hergos launches a Redeye missile. Hawke reacts just in time but the missile blast damages some of Airwolf's electronics, disabling its weapons. Hergos wants to continue dropping depth charges but Hawke takes Airwolf back over the boat and engages it with his pistol, forcing Hergos and Joskins off the deck into the cabin. Dominic fixes the weapons systems and Hawke launches a couple of missiles which blow the boat up.