Chase Into Space: Part 1 - S1-E44
Continuity mistake: The space shuttle at Nasada - first it is below ground (as shown by the little amounts of light), then it is in the open (we see the Rangers get inside the shuttle, and it is a sunny day), and then we see the shuttle be raised up from the underground.
Chase Into Space: Part 1 - S1-E44
Continuity mistake: The Rangers try to use the Rescue Megazord's Artillery Power to defeat Divatox's monster. After it fails, the monster blasts energy at the Rescue Megazord - at which point its shoulder-mounted Artillery cannons disappear. They reappear again in the next shot.
Answer: The Rangers are human. Blue Centurion is a robot/cyborg.