For decades, the story of the Beach Boys has been the story told in the 2015 Brian Wilson biopic Love and Mercy: Brian was the genius who put the band on the map, but a combination of drug addiction and mental illness led to his downfall. Some versions of the story, like the TV movies Summer Dreams and The Beach Boys: An American Family also portray Brian's "bad-boy" brother, drummer Dennis Wilson, as a doomed romantic figure whose drowning in 1983...