In addition to donning considerably shorter hair and glasses, Jason Gerbay is 40 lbs. heavier than he was when he played Roger in "Abnormal Activity 3". He gained the weight and new look in order to play and differentiate a new character, his own twin brother, Jared. His original role, Roger is not portrayed in the this film, aside from file footage.
Emily Durkheim was the last remaining female character in the franchise to "exploit". Credited only as "Party Girl" in the first "Abnormal Activity", she headlines this third installment in the series.