I worked on early stages only of Galaxy Quest and was off the show after the initial design stages were nearly complete. Below are a few of my designs and color concepts. The final piece is a sculpt of Sarris I did after leaving Stan's that was inspired by my concept drawing.
Photoshop illustration of Thermian
Original clay sculpt by Christopher Swift
Pig Lizard Concept #1
Pig Lizard Concept #2
Alien Miner Concept
Sarris Concept with elements from a sketch by Bernie Wrightson
Early Sarris Sketch drawn on black paper with white pencil