Alfred Ryder

Alfred Ryder (born Alfred Jacob Corn) was an American television, stage, radio, and film actor and director, who appeared in over one hundred television shows.

STAR TREK: THE ORIGINAL SERIESS1, E1

The Man Trap

After landing on planet M-113, the Enterprise is stalked by a creature which can assume the shape and form of anyone it chooses and which kills by removing the entire salt content of its victims' bodies.