While on her date with Zane, Deputy Sheriff Lupo's Special Forces tattoo is missing from her left shoulder.
When Niall Matter's character Zane Donovan is on a date with Deputy Jo Lupo, Deputy Lupo mentions the time when Donovan attended MIT at the age of 15. In the Season 2, Episode 8: E-MC...? The sheriff, when looking up Donovan's police record, mentions that he attended MIT at the age of 13.
Diane quotes a verse from the Bible which she calls "Revelations" but the book is named "Revelation."
Infrasonic sound is found to be the culprit, however infrasonic refers to sounds below the range of human hearing. In the lab when Henry is explaining and demonstrating this, you can clearly hear the audio frequency going up, heading toward ultrasonic territory.
Diane is faking playing the keyboard. Her fingers do not sync with the notes and chords.