TV review.
This is a broader review of a genre.
TV and movies have been setting up the premise of a cast being amateur detectives since forever. This is so they can meet all different kinds of people and get up to all kinds of hijinks, the whodunnit is secondary . Usually the first series or movie seems to have more of the detective work , after that the characters are established and they just do the hijinks. Some examples are The Three Stooges, The Thin Man series of movies, The Monkees, Scooby Doo, ATHF, and most recently Only Murders in the Building.
They are all good fun shows. :)