HBO Documentary Films presents ; a Jet Black Iris America production ; in co-production with ZDF and in collaboration with ARTE ; written, produced and directed by Adam Benzine
director, Frank Garbely ; written by Frank Garbely, Martin Witz ; production, Adrian Zschokke ; a coproduction of R-Film GmbH, Aïe Productions SA, Télévision Suisse Romande [and 4 others] ; producer, Keith McClennan