Fifteen Not watching might kill you. A serial killer is using Periscope video streaming app to film his grizzly murders live. Details Casts Videos Galleries Posters Title Fifteen Release Date 2015-10-29 Runtime 00 Hours 20 Minutes Genres Thriller Horror Production Companies Blumhouse Productions, Mimetic Entertainment Production Countries United States of America Neil Napier... Truman... Sarah Booth... Jessica... Hannah Kat Jones... Angie... Alastair James... Richie... Paula Jean Hixson... Pamela... Kyle Cassie... Boyfriend Caller... Mike Huq... Dr. Gerald Sanford... Luke Nugent... Radio DJ (voice)... Blumhouse presents "Fifteen" (Periscope Live Film) (Featurette) Original Size (1280x720) Original Size (2000x3000)