The major wasn't at all worried about Malcolm, looking more amused than anything. A doppelganger couldn't stand up to the original no matter how hard they try, after all. Besides, there was no harm in playing with him for a while as he figured out what exactly was going on.

"And what would happen if we decided to not explain ourselves to you?" He looks him up and down, his expression one of disinterest as he does. Clearly someone doesn't think too highly of Malcolm. Putting an arm around Trip's shoulders, he smiles at Malcolm, this being somewhat better than his grin. "You've given us no reason to and I don't feel like explaining myself to you."