Around the 5 minute mark when Sydney is being questioned by the committee her milkshake switches sides between takes.
While it is proven to be able to breathe underwater, car tires contain iron reinforcement strips which will oxidise over time, so there may be less oxygen in the car tire than expected.
The first time Sydney mention Rambaldi's name to Kendall, she pronounces it "Meelo", then in the next scene she says is correctly "Milo."
When Sydney is driving of the harbor into the ocean, the front wheels of the car are pointing to the left, yet the car is going straight. There are also visible wires attached to the front of the car as well as the back of the car, showing that it is being dragged.
While Sydney's car is sinking in the ocean, the walls of the tank the car is being filmed in for close-ups can be seen.
In Truth Be Told (2001), the SD-6 set appears different. When she returns three months later in So It Begins (2001), the SD-6 set is different. But in this episode, when Sydney flashes back to when she first started working for SD-6, the set appears as it did in "So It Begins", not "Truth Be Told".
The flashback to Spirit (2001) uses an alternate scene than in the original episode (Sydney doesn't accentuate the "Thank" in this episode).
During a flashback that is supposed to take place during 1992, a flyer for the movie Requiem for a Dream (2000) can be seen.
In Truth Be Told (2001), Sydney tells Danny she worked for SD-6 for one month before being upgraded to agent. In this episode, she says she worked for the bank for six months before beginning working for SD-6.