Lea:

I love that the main guy pokes around the vehicle while speaking - might be an obvious choice, but it's a good one and it makes the animation shine. If anything, it looks like more effort was put into the alien than into the human. The "Plutonium" part jumps him into pose without settling him and I feel like the silhouette could have been stronger with more attention to his fingers. Overall though, good job!

Danny Kneip:

The second camera shot jumps the 180 line of action, and though I understand why, it is a very jarring transition and could have been set up differently. The animation itself could benefit from additional polishing. Doc's lunge is really amusing, but he snaps into position and his body freezes. The alien only appears to truly blink once (he closes his eyes a few times, but they're not blinks).

Ian Alexander Hanson:

Like his first look with one eye. Also like how Doc got to him quickly. Doc should decidedly leave the room by the end.

Doc has knee pops and body can be very disjointed at points.

Ed Seager:

227 I would have him antic slight banana bend right, you need probably 2 frames to get to 228. but would have him kinda sink down towards the camera with the body in a curve shape.
you need one more frame between 229 and 231.
232 on ward for a few frames you need to settle the pose and ease him in. hope that makes sense :S