4D Man

A scientist discovers a formula enabling him to pass through solid surfaces, but he also rapidly ages, which forces him to kill humans in order to reverse the aging process by absorbing his victims' energies.
Two brothers, scientists Scott and Tony Nelson, develop an amplifier which enables a person to enter a 4th dimensional state, allowing him to pass through any object. Scott experiments on himself and discovers that each time he passes through something he ages rapidly. He begins killing people, sucking out their life energies and regaining his youth as a result.