The Suicide Theory is a 2014 Australian thriller film directed by Dru Brown and written by Michael J. Kospiah.

As Steven discusses his wife's pregnancy with a friend who owns a store, a rude man interrupts them.

As he prepares to kill his next target, Frank Dubois, a man falls from the building on to the cab he is in, setting off another panic attack.

Percival reveals that he is a gay man and that part of his suicidal tendencies come from the death of his boyfriend, Christopher.

Steven experiences continued reluctance in killing Frank Dubois, much to the annoyance of his employer, Thomas.

He excitedly calls Percival, thanks him, and explains that he has found his purpose in life and now believes in fate.

Steven has been killing people based on a half-remembered license plate ever since Annie's death to hopefully get to his wife's killer.

When he sees Christopher's finished portrait, he is horrified to recognize him as the rude man from the store, whose murder set in motion his own tragedy.

[7] Martin Tsai of the Los Angeles Times wrote, "Although Michael J. Kospiah's script isn't exactly predictable or didactic, it does feel contrived and improbable on occasion.

"[8] John Hartl of The Seattle Times rated it 3/4 stars and wrote, "As curiosities go, this one could belong in cult-movie heaven.

"[9] Charles Bramesco of The Dissolve rated it 1.5/5 stars and wrote, "A fatal excess of meaningless metaphysical jibber-jabber chokes the life out of this film".