Continuity mistake: When the kidnapper is taking the girl out of the basement, she is barefoot as she climbs the ladder; but when Morgan pulls her out of the car, she is wearing sandals with an intricate strapping pattern.
Suggested correction: It's quick, but if you look close you can see the heel strap of her sandals as she takes the first step on the ladder.
Continuity mistake: While Morgan and Prentiss are at the crime scene talking to the homeless man, when Morgan moves the tent and finds the text written on the wall, the homeless man smudges the text with his fingers, but when Morgan sends a photo of the evidence the smudges and text differ.
Continuity mistake: During the lake scene, it's sunny when they are showing the suspect and victim driving toward and into the lake, and it is raining when Morgan is shown running after the car and diving into the lake.