It’s been heavily agreed that “Mangrove,” the first entry of Steve McQueen’s “Small Axe” is the best of the five-film limited series, feeling the most cinematic and layered narrative structure. Shaun Parkes as Frank Crichlow delivers purity in his portrayal, and with his counterpart Letitia Wright likely one of the favorites in supporting actress, he could sneak in alongside her. – Clayton Davies