Self/less (2015)

In *Self/less* (2015), Damian, an incredibly wealthy but terminally ill businessman, makes a desperate choice: to undergo a radical procedure that transfers his consciousness into a new, youthful, and seemingly healthy body. Initially thrilled by this second chance at life, his elation quickly sours as unsettling visions and disquieting discoveries about the body's origins begin to plague him. As Damian delves deeper, he uncovers a shadowy organization with a vested interest in keeping its secrets buried, setting him on a dangerous path where the truth is a matter of life and death. This film earns its place on a "Best Mystery Movies" list not for its traditional whodunit structure, but for its compelling exploration of identity and the chilling implications of scientific advancement. The mystery here is multifaceted: it's about unraveling the provenance of the man Damian now inhabits, exposing the clandestine activities of the corporation behind the consciousness transfer, and ultimately, questioning the very nature of self when stripped down to its core. The escalating suspense, combined with the protagonist's personal stakes and the paranoia of being hunted, creates a taut and engaging thriller where the answers are as perilous as the questions.