Other: Episode 22, Season 1, titled "The One": The captain talks about the "outflow valve", which has a distinctive rectangular shape and is fitted flush with an opening in the aircraft skin. It would be immediately recognizable by any crew member because it part of the walkaround inspection before each flight. He is holding a round pneumatic supply valve instead, which is part of the internal ductwork.

Factual error: Episode 22, Season 1, titled "The One": The tail section of the crashed plane is from an early model 737, based on the curvature where the forward edge of the vertical stabilizer meets the top of the fuselage. The maximum seating capacity would have been about 130 passengers, while the number of crash victims was given as approximately twice that.

Other: Season 1, Episode 22 - "The One": The tail and nose section of the crashed plane are from a 737, which has only a single axle on each landing gear. Landing gear with dual axles, from a much larger plane, can be seen in several scenes.

Continuity: In the episode titled "FURY" when Melinda is lying in bed talking to her husband her hair keeps moving from all lying on the right side of her pillow to completely under her head.

Continuity: In th episode "Final Execution" when Melinda's hair is caught in the garbage disposal, she reaches for the switch and it is in the down position. When it switches back to her and then back to the switch, it is now in the up position.

Continuity: In the episode named "Love Will Never Die," while Melinda is driving to Maine, her car switches from being a Jeep Cherokee to an Isuzu and back again.

Continuity: When Melinda and Andrea are sitting on the park bench talking Andrea's hand keeps moving back and forth between on her cheek and on the back of the bench.

Continuity: When Melinda is driving to Clark's house she is in a Jeep Cherokee, but when she arrives she is in a Jeep Liberty.

Continuity: At the end of the show when Jim is making toast they show him through the window taking the toast out of the toaster and putting it on the plate. In the next shot he is walking towards the kitchen table and the plate is empty. Then while talking to his mother he picks up a piece of toast to put jelly on it.

Continuity: When Melinda is driving to Clark's house when she is shown from a distance she is wearing a red hat. When they show her close up she is not wearing a hat.

Continuity: When Melinda is talking to Kyle, her mole moves around several times.