Wilson’s Harry Mudd makes his entrance into CBS All Access' “Star Trek: Discovery," he does so in dramatic fashion, stepping onto a cargo bay deck through the mouth of a gormagander. The fictional creature is referred to in the episode and by the show’s creative team as a “space whale” and looks the way it sounds: Picture a whale redesigned to swim through space instead of water. “Discovery” writers dreamed up the creature as a way for Mudd to sneak on board in an episode where he attempts to take over the show’s starship. The gormagander is the central element of what quickly becomes an action scene when Mudd begins firing at crew members. Initially attempted as a practical effect, it was ultimately executed by the show’s digital- effects team.