A strong cast (Paul Newman, Lauren Bacall, Janet Leigh, ...) tries to update the hard boiled L.A. noir of Bogart/Chandler to colour in 1966 with middling success. Newman does get some great lines, but Mitchum's effort a decade later is superior. There's a kidnapping, maybe, and everyone is in on everything but not all get their comeuppance; script is so tiresomely formulaic that by the time Newman recovers the money you've forgotten there was money. Apparently there's a sequel The Drowning Pool which I probably won't bother chasing up.
Bosley Crowther reckoned it was stale on arrival.