Kill Switch is a 2017 American-Dutch science fiction film, directed by Tim Smit in his directorial debut, from a screenplay by Charlie Kindinger and Omid Nooshin. It stars Dan Stevens as Will Porter, a former NASA pilot-turned-physicist recruited to reverse the damages of harnessing unlimited quantum energy, at the cost of either one of two universes colliding. Bérénice Marlohe, Tygo Gernandt, Charity Wakefield, Bas Keijzer, Mike Libanon, and Mike Reus also star.

Daniel Jonathan Stevens is an English actor. He first drew international attention for his role as Matthew Crawley in the ITV acclaimed period drama series Downton Abbey (2010–2012). He also starred as David in the thriller film The Guest (2014), Sir Lancelot in the adventure film Night at the Museum: Secret of the Tomb (2014), The Beast/Prince in Disney's live action adaptation of Beauty and the Beast (2017), Lorin Willis in the biographical legal drama Marshall (2017), Charles Dickens in the biographical drama The Man Who Invented Christmas (2017) and Russian Eurovision singer Alexander Lemtov in Eurovision Song Contest: The Story of Fire Saga (2020). From 2017 to 2019, he starred as David Haller in the FX series Legion. In 2018, he starred in the Netflix horror Apostle, and since 2023, he has starred as Korvo Opposites in the animated series Solar Opposites.