Revealing: During the title sequence when Blair Tefkin's name comes up, Mike Donovan is riding a horse. A Visitor craft passes overhead and shoots at Donovan, but the laser appears out of nowhere instead of from the craft.

Continuity: The last time Donovan hits Diana's craft with a laser, he hits it on the right side. But inside the craft it's the left hand side that explodes.

Continuity: When Diana is being chased by Donovan after crashing her craft, she has her normal human eyes. But during Donovan's strangulation attempt she has lizard eyes. As we saw in the original series, a Visitor's human eyes had to be removed by hand before the lizard eyes could be seen underneath.

Revealing: When Robert and Julie are attacked by snakes outside the cave, notice that in the shots when you see the backs of Robert and Julie there are hardly any snakes on the ground (I counted one) compared to other shots. The shots of Robert's leg as he sweeps the snakes away are almost certainly of a snake handler instead of the actor.

Revealing: When Donovan finds Diana's abandoned car in the desert, the outside shots of the chopper reveal that it is not Marc Singer at the controls.

Deliberate "mistake": When Robert and Julie find Elizabeth in the cave, there are all sorts of lights emanating in there, particularly a green one. Obviously done to enhance the moment, but most caves would be pitch black, and the cocoon itself was not generating any light.

Continuity: When Elizabeth's arm is waving about above the cocoon, it is covered with scaly skin. But when she is seen standing up pulling the scaly skin off her face, both her arms have no scaly skin, and there wasn't enough time for her to remove it.

Audio problem: When Ham Tyler is shooting at Diana, two holes are made in a piece of wood behind her but only one shot is heard.

Plot hole: At the press conference Ham Tyler positions himself only a few feet in front of about half a dozen security guards, yet not one of them notices him, even when he starts shooting.

Audio problem: When the two dogs attack the Visitors, you can see them biting the Visitors on the ground but barking is still heard.

Revealing: When Elizabeth supposedly starts playing the piano, her shoulders aren't moving so it's easy to tell she's not touching any keys, even though notes are heard.

Visible crew/equipment: When Diana and Lydia are walking in the mothership corridor there are two things to look out for. When Lydia first starts talking a section of the whitescreen appears in the top right of the picture. Then a couple of seconds later the shadow of the camera appears on the door to her left.

Visible crew/equipment: When Sean enters Mike's bedroom after the capture and says 'dad, you're awake', the boom mike is reflected briefly in the wall mirror.

Continuity: When Mike is about to kiss Diana, he puts his thumb on her chin. Then in the next shot his thumb is away from her chin.

Other: At the end of episode 2, Robin escapes from the Visitors into the wilderness. In episode 3, she's seen in an internment camp with no explanation as to how she got there. She is also wearing different clothes. She later escapes the camp along with other resistance members. Then at the beginning of episode 4, she is back alone in the wilderness, wearing the same clothes as at the end of episode 2. My guess is that episode 3 was added as an afterthought.

Continuity: When Diana is about to eat the white mouse, Donovan puts the tray of mice down on the bed, then in the following shot he puts it down again.

Revealing: When Ham drives the van through the road barrier, the pieces fall off very easily considering how slowly he was travelling. In the next shot it is shown that the remaining barrier sections are both split vertically, revealing that they were sawed in the same direction beforehand, then the 'broken' pieces loosely affixed before the collision.

Plot hole: Ham Tyler doesn't recognise Kyle Bates even though he met him in the internment camp in episode 3. Ham also makes exactly the same remark about Nathan Bates in both episodes.

Continuity: When Ham Tyler is fixing the van in the garage, there is sunlight shining on him when the camera is facing out onto the street, but there is only normal daylight when the camera is facing inside the garage.

Continuity: When Mike pulls the necklace off the fake Julie, Julie's head is lying at a slightly different angle than when she changes into Lydia.