Photo: Michael Parmelee/CBS
Usually, we viewers know whodunit before the cold open of each episode of Elsbeth. In those cases, the fun is in watching Elsbeth and Kaya figure out and expose the murderer of the week, but for “Tiny Town,” even though we don’t know whodunit before our favorite investigators, our forensic gaze is still trained most sharply on the sweetly unfolding transatlantic romance between Elsbeth and a handsome singer-songwriter and [profession redacted for the moment] in Scotland. Yes, the number one eyewitness to the…