Updated: December 23, 2025

The Robot consisted, from top down, of....

A glass bubble sensor unit with moving antennae;

A fluted, translucent ring collar ( Actually an arrangement of shaped ribs, through which performer Bob May could see );

A cylindrical, rotating trunk section with extending bellows arms that terminated in red mechanical claws. The trunk section had controls, indicators, a small sliding translucent door through which data tapes, similar to punched tape, could be accessed ( "The Hungry Sea" ), a removable power pack and a signature chest light that illuminated in synchrony with the Robot's speech ( May had a key inside the suit that he would tap in time with his speech to illuminate the light, resulting in some scenes where one of the claws can be seen moving in time with the light );

Bellows legs that were understood to move with some agility but which, due to real-world practical limitations, were rarely seen on camera to move separately; and Trapezoidal continuous track units at the bottom of each leg. These normally paired as a single locomotive device, but they also could function as individual feet. The leg and tractor sections apparently could be readily detached, allowing the Robot to be positioned in the rear of the Chariot ATV, although the actual disconnect operation was depicted only once.

According to the Series:

The Robot possessed powerful computers that allowed him to make complex calculations and to deduce many facts;

He had a variety of sensors that detected numerous phenomena and dangers;

He was programmed with extensive knowledge on many subjects, including how to operate the Jupiter-2 spaceship;

His construction allowed him to function in extreme environments and in the vacuum of space;

He was extremely strong, giving him utility both in performing difficult labor and in fighting when necessary. Moreover, his claws could fire laser beams and, most frequently, a powerful "electro-force" that was similar to arcing electricity.

In one first season episode, Doctor Zachary Smith was seen to remove the robot's programming tapes, which resemble a small reel of magnetic tape, from a hatch below the robot's chest panel.