‘Knives Out’ is one sharp murder mystery — with a surprising political edge

New on Blu-ray “Knives Out” (Lionsgate DVD, $29.95; Blu-ray, $39.99; 4K, $42.99; also available on VOD) Writer-director Rian Johnson and an all-star cast put a fun spin on an old-fashioned murder mystery in this cleverly plotted and witty whodunit. Daniel Craig plays the dapper detective Benoit …