Complex sentence: He has been assigned to observe human behavior, by Orson, his mostly unseen and long-suffering superior (voiced by Ralph James), who has in fact sent him to get him off Ork, where humor is not permitted.
Split into simpler sentences: He has been assigned to observe human behavior, by Orson, his mostly unseen and long-suffering superior (voiced by Ralph James). Orson has sent Mork, in order to get him off Ork, where humor is not permitted.