7 Days

In a previous episode ("Crystal Blue Persuasion") Olga goes to her kitchen which is just inside the door. In this episode the kitchen has now turned into a office area with desk.

When Camila and Caesar kidnap Taylor back the van they use is black. When Frank later calls NNL to task satellite time to track the van he reports it as green.

When Frank goes to save the kid being kept prisoner, the terrorist is shooting at Frank when he is behind a wooden wall. Bullets make sparks against wood but there are no bullet holes. How can bullets ricochet or make sparks off of wood, especially being shot directly at it?

In the scene in the missile control room, when Garcia forces the soldier to insert his key to enable the nuke, debris is clearly visible on the floor--debris caused by the attack on the base which does not take place until a few minutes later.

If Alternate-Frank is such a hard-hearted jerk (as Alternate-Svetlana describes him), how did Alternate-Ramsey ever become friends with him?

Not exactly a goof, but what happened to Mentnor and Ballard in the alternate universe? They played a critical role in developing Backstep, along with Olga, but in this universe Olga died young and the other two aren't mentioned at all. So who developed Backstep from the alien power source? It's implied the alternate Talmadge did, but there's no indication he's ever been that capable as a scientist.

This is the first episode where Frank doesn't Backstep.

When Parker is infected with the alien virus, the team was trying to decide how to get out of him before he Backsteps but why not just use Donovan? Granted, Frank has been the only chrononaut to survive but still, wasn't it worth a shot to use Donovan rather then gamble on if Parker would take it back or not?

When we first see McGrath's tattoo in sickbay, the numbers are "24 666 42." When McGrath shows the tattoo to Parker on the roof near the end of the episode, the numbers are "24 666 12."

During the gun battle in the launch bay, when Parker finally reaches the Sphere, he immediately flips down the visor on the helmet. In the next two shots of him on the monitor in the control room, the visor is up. Right before he engages the sphere, we see a monitor shot and the visor is back down.

At approx. 24,5 minutes into the episode, there is a scene where DeeDee is throwing empty bottles, which Frank is handing to her, onto a river bank. One of the bottles that Frank gives her is a brown beer bottle but in the next cut and from the opposite angle, and showing only DeeDee, she is holding a transparent wine bottle.

What's with neutron explosion making people disappear along with their clothes, including shoes? In the store, clothes and shoes are still there. What should've happened is either the people should have disappeared but their clothes were left, or all the clothes disappear whether people were wearing them or not.

The bit where Frank "accidentally" shoves the tool cart that shatters frozen Hooter looks anything but accidental. Also, if there were tools in the cart, it would not have tipped up the way it did.

EMP is supposed to fry any circuit currently emitting an electromagnetic pulse. If that's the case, why is the police motorcycle's lights still on when they first exit the facility?

Trivia: This episode addresses how Project Backstep never runs out of fuel from the aliens: the fuel regenerates itself, but it takes seven days to do so.

Frank knows where Backstep is located - why don't the terrorists get the information out of him using the truth serum in the first timeline?

When Frank is hanging from the wire before retrieving the PDA, he gets an electric shock from the wire. This should not be possible since Frank is not grounded and the wire presents a better path for the electricity. This is the same principle that allows birds to hang out on power lines without getting fried.

Though FEMA said that the virus was airborne, the agents who puts out the bomb to blow up the city doesn't wear masks, and would be infected just like the townsfolk.

Late in the episode Frank Parker cuts his hand by crushing a glass with it, but not long after his hand is fine with no cuts or bandages.

Since the guy came back in time with his more advanced "sphere," why didn't they consider using that or taking the technologies from that for the future?