Continuity mistake: Kai's severed arm grabs Thodin's invisible leg which is what helps Kai find him. Kai's arm was in front of Thodin and when Kai kills him, Thodin falls forward face first. Then in the next shots as the camera pans over Kai's severed head and arm before he reaches down to pick them up, there is no sign of Thodin's body at all. It should have been right next to Kai's arm and head since it fell forward. (01:02:45)
Continuity mistake: When Stanley starts trying to make out with Xev on The Lexx after they destroy the outpost, Giggerota is watching from behind the Lexx's control chair and has her hand up on the edge of it. When it cuts to a different angle before Xev pounces on Stanley to try and eat him, Giggerota's hand changes positions to further down on the chair. (01:12:30)
Continuity mistake: After Kai kills the Cluster Lizard he finds attacking the Divine Predecessors, he walks over and picks up a part of one of their brains as it transfers a faint memory into him. His hand turns sideways as he holds the brain part, but when it cuts to a different angle his hand is turned down again. (01:17:00)
Continuity mistake: After Stanley tells Xev about the map inside his tooth, she reaches for his face to pull the tooth out and it shows her hand on top of Stanley's hand against his cheek. But in the next shot her hand is in front of his mouth in front of Stanley's hand. (01:19:25)
Continuity mistake: Stanley holds 790's head while the robot gives The Lexx the coordinates from Stanley's tooth. As 790 first starts talking, it shows in a close up that Stanley is holding him where 790 is facing forward. But in the next shot he's suddenly holding him where he's looking straight up into the air. Also Stanley's right hand goes from holding 790 to picking at his own mouth between shots. (01:20:40)
Continuity mistake: When Kai and His Divine Shadow face off in the room of the Predecessors, Kai backs up and you can see the body of the Cluster Lizard he killed earlier behind him. But in a couple of shots it's suddenly in front of him. (01:24:00)
Continuity mistake: After they get through the Fractal Core and Kai defeats His Shadow, the Mega Shadow starts firing on The Lexx. In one shot it shows 790's head still on the foot rest of the Lexx's control chair. Yet in the next shot he's suddenly on the ground. (01:27:05)
Continuity mistake: Inside the Mega Shadow once they fire on The Lexx, it shows the hologram of the two ships. The Mega Shadow being the purple figure with the Lexx the large green and yellow one. But in the next shot it shows that the Lexx is facing the Mega Shadow. Then again inside the Mega Shadow the hologram shows the purple ship to its side. (01:27:15)
Answer: From what I'm seeing, the answer seems simple. The robotic heads allow the control of the body they need. However, no mater how advanced you make a robot's body, it will never quite be as flexible and versatile in it's movements and actions as a flesh and blood human body can be in most cases. And if they do put the effort into creating a robotic body with the capabilities they need, and be durable enough to last... it would cost a lot of money. The Cluster has a large influx of constant prisoners that they use for feeding the Lexx and other needs, so human bodies are easy to come by and in vast quantities. Them simply producing robotic heads with the ability to interface with the human nervous system and placing them on the decapitated bodies of expendable prisoners is a hell of a lot more cost effective and easier to do with the technology they have. It's just a cheaper, more effective option for them to have thousands fo 790 Units in production and use without the cost of manufacturing a fully functional and durable robotic body for them.
Quantom X ★