A major plot point in the episode involves Cameron discovering that Cromartie's head went through time, too. She discovers this while viewing news footage taken soon after Sarah, John and Cameron arrived in 2007. However, previous episodes established that Cromartie's head arrived sometime after the trio left the scene, so it should not have been visible on the videotape.
Near the end of the episode, after Cameron crashes the cargo truck and is walking towards Sarah and John who are standing by the Hummer, both doors on the Hummer are open. There is some dialog between John and Sarah, after which they turn back towards the Hummer, and Sarah's door is now closed, and she opens it.
Smoke can be seen coming from the rear of the truck as it goes over the cliff down to the water. Yet the scene just before as Cameron jumps off doesn't show any smoke, nor does the scene of the truck hitting the water.
Before John Connor leaves the bunker in the truck, the two terminators are fighting and the back of the truck is empty. Before and after the fight, it is full of crates.
When John's cell phone breaks and Sarah can longer track him from the computer, she laments that "I can't believe I let him talk me into this." But in fact, John had not talked her into it, he had run into the warehouse expressly without her permission.
Cell phones are designed to absorb reasonable shock impact from being dropped from a few feet. Therefore, it seems unlikely that John's cell phone would be totally disabled from a short drop inside the back of the truck.
While overseas US military bases in war zones like Afghanistan and Iraq may have minefields, US military bases in the US do not have minefields surrounding them as this would pose a danger of accidental discharge by military people, civilians, and animal life.
When Lazlo is back home after interrogation by the police he can be seen drinking from a can while placing some food in the microwave. The can, though, isn't open yet (notice the pull-tab). Even when he drops the can (when the terminator grabs him) nothing pours out on the floor.
The Terminator guarding the alloy keeps his eyes open when he is inactive. It has been established that Terminator eyes are organic, and keeping the eyes open would cause them to dry out.
U.S. Army soldiers are shown wearing Desert Camouflage Uniforms in 2007. By then, they had been mostly replaced with the Army Combat Uniform so they should have been wearing those instead.
The terminator showed his badge to a guard that let him into Depot 37. It wasn't shown however, how Sarah and Cameron made it inside the facility, or how they got out.
Cameron claims that when terminators are re-programmed in the future their memories are scrubbed to make them easier to convert. Yet she says she remembers being built in a factory in Depot 37 on the military base. She couldn't remember this if her chip was scrubbed of all former memories.