Currently you are able to watch "Unstoppable" streaming on fuboTV or for free with ads on Peacock, Peacock Premium, The Roku Channel, Redbox, Crackle, FILMRISE, Freevee. It is also possible to rent "Unstoppable" on Google Play Movies, YouTube, Vudu, Apple TV online and to download it on Apple TV, Google Play Movies, YouTube, Vudu.
The deranged military and former CIA agent Dean Cage is in a rehab program, trying to forget the traumatic loss of his best friend Scott in Bosnia. When he dates with his girl-friend and Scott's sister, Detective Amy Knight, in a dinning restaurant, he is mistakenly taken as being the CIA agent that is investigating the robbery of the military experiment EX by a man called Sullivan. He is injected with the drug and abducted by the thieves. Amy has six hours to find the also stolen antidote and save Dean's life.