Lummie

Correction: As their reaction shows they did not really remember him. The Thermians much like any fan of a show will most likely remember many of the major characters, plots and certain details of the show. That's not to say they will remember every single detail but just the important ones, like the names of the major crew members and so forth.

Lummie ★

Correction: Just because he wasn't able to remember his last name at that point does not mean it was a deliberate mistake. I know through myself that sometimes I can't always recall someone's first or last name and then all of a sudden I can remember it. Unless Jason had been calling Fleegman repeatedly and it was proven he knew his last name very well, then its just assumption it is a mistake.

Lummie ★

Correction: There's sufficient time between the scene in the landing pod and the scene on the alien planet for Guy to tell Jason his last name, or even for Jason to ask him about it offscreen - in the pod, Jason had looked uncomfortable enough to want to finally learn this important piece of information about his "crew member."