In Part I, the probe launch failed and it came back down without achieving escape velocity. In Part II, Steve, Oscar and Irina act as though it reached Venus, went through the atmosphere and still managed to retain interplanetary speed to return to Earth, highly pressurized and waiting to be lifted high and blow apart. 1. there is no "free return" trajectory from any planet to Earth. 2. if it was pressurized at Venus, it would blow apart on leaving that atmosphere. 3. if the carrying capsule stayed sealed back to Earth, why would it open during the pass through Venus' atmosphere? 4. How could it be permeable enough to assimilate extra atmospheric pressure, but be impermeable after leaving and coming to Earth, unless it has one-way vents. 5. Panels on it open from time to time for tools to come out, so it isn't airtight, and if the main computer system is protected from Venus' corrosive, thick atmosphere, it should stay protected so the computer isn't crushed by the atmosphere.
The speed of the probe's winch-winder does not match how fast Steve is being pulled toward the probe.
The probe's carbide cutting-wheel is only making small scuffs and nicks in its winch-cable, yet in the next shot, the cable is largely sawn through, with many of the cut strands unravelled and frayed outward.
When Steve is battling the probe at the beginning of the episode, he is wearing light brown shoes. But in a close up insert where he is on top of the probe trying to punch a hole in its armour, he is wearing dark grey leather boots. Then when he jumps off the probe, he's wearing the brown shoes again.
As the probe approaches the fencepost to pull it out, the post is heavily shade-dappled and in a darkly-shaded spot, yet in the subsequent shots of the probe pulling up the post, the scene is in full sunlight.
Irina states that the probe's roof-mounted fitting for a hoisting-cable is "twelve centimeters", yet the hole and the bolt that fits into it is merely three or four centimeters in diameter.
When the Russian man raises the rocket launcher to aim at the probe right before shooting the rocket, we can see clear through the weapon's tube; it is clearly empty, with no rocket loaded inside it.
The probe is supposedly electrically powered so that it can operate in an airless space environment, yet visible exhaust vapor can be seen coming from the back of the machine on more than one occasion.
Steve's bionic arm would be unable to pull the helicopter down while standing with his legs clamped onto the top of the probe. The force would be transmitted through his non-bionic spine and tear his back apart..