Best of the "Whodunnit?" Genre (Part Two)

by Eurocheese
If you missed part one, we're celebreating the whodunnit subgenre since Knives Out is out soon. Last time we listed rules of the genre (not all mystery and investigation films are whodunnits) and sang the praises of Gosford Park and The Thin Man. Now let's continue the list,
6. The Big Sleep
Bogie was bound to show up on this list (spoiler: he will again), and what better way to do it than next to his leading lady Lauren Bacall in her (arguable) career-best role...