“Blackout” (**1/2 out of four) was a moderately entertaining suspense thriller about a man (Josh Duhammel) who awakens in a hospital after a severe accident and has no memory of his past but has to relearn it fast and piece together his memories as he’s pursued through the hospital by deadly assassins (led by Omar Chapparo) and a grizzled cop (a well-cast Nick Nolte). No masterpiece, as film derivatively tries to mold together a Hitchcock mystery with “Bourne” thriller elements, but keeps its grip thanks to taut pacing and a solid cast. Abby Cornish has a key ambiguous role as a mysterious woman by Duhammel’s side.