Welcome back to our queer film retrospective, “A Gay Old Time.” In this week’s column, we’re revisiting the 1982 whodunit Deathtrap, which notably featured a, well… *spoiler alert*Murder mysteries and whodunnits tend to have a particularly queer appeal. The worlds of Agatha Christie, Jessica Fletcher, or Benoit Blanc are always full of larger-than-life characters hiding secrets from each other, exotic faraway locations, fabulous women wrapped in outrageous clothing, and drama hiding in every corner.