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The movie's plot is based on the true story of a group of young computer hackers from Hannover, Germany. In the late 1980s the orphaned Karl Koch invests his heritage in a flat and a home computer. At first he dials up to bulletin boards to discuss conspiracy theories inspired by his favorite novel, R.A. Wilson's "Illuminatus", but soon he and his friend David start breaking into government and military computers. Pepe, one of Karl's rather criminal acquaintances senses that there is money in computer cracking - he travels to east Berlin and tries to contact the KGB.

August Diehl
Karl Koch

Fabian Busch
David

Dieter Landuris
Pepe

Jan-Gregor Kremp
Lupo

Burghart Klaußner
Weber

Stephan Kampwirth
Jochen Maiwald

Zbigniew Zamachowski
Sergej

Peter Fitz
Brückner

Lilly Marie Tschörtner
Beate
Arnulf Schumacher
Seybert

Patrick Joswig
Alex

Sven Lehmann
Computerverkäufer

Regine Zimmermann
Pepes Freundin

Armin Dillenberger
Kellner im Zug

Oscar Ortega Sánchez
Mr. Minit

Brigitte Janner
Sekretärin

Hedi Kriegeskotte
Heimleiterin Frau Helldorff
Alexandra Hartmann
Prostituierte
Claudia Boneberg
Prostituierte

Hanns Zischler
Karls Vater
Katrin Klein
Sekretärin

Karin Gregorek
Karls Stiefmutter
Tom Keidel
Conan
Jörg Schmitz
Kugelfisch
Christian Wolff
Scarabaeus
Johann Claussen
Pfarrer
Jan-Gregor Kampwirth
Partygast
Nina Bühler
Alex’ Freundin
Katja Klauss
Alex’ Freundin
Robert Anton Wilson
Er selbst
Tirzah Haase
Nachrichten (voice)
Beate Himmerlstoss
Nachrichten (voice)

Josef Tratnik
Nachrichten (voice)
Peter Veith
Nachrichten (voice)
Jessica Lohmann
Nachrichten (voice)
Anna-Maija Tuuliainen
Nachrichten (voice)
Igor Davidovski
Nachrichten (voice)

Dietrich Brüggemann
Bit

Muammar Gaddafi
Self (archive footage)

Hans-Dietrich Genscher
Self (archive footage)
George Shultz
Self (archive footage)

Richard von Weizsäcker
Self (archive footage)

Olof Palme