Bernd Watzka’s “Feuersalamander 451” is inspired by Ray Bradbury’s “Fahrenheit 451.” Clara plants the seed of doubt in Montag, a young man of a totalitarian regime’s special unit — firemen who once extinguished fires, now sent to burn books and root out the resistant. Director Valentin Werner has three actors juggle a wide range of roles in loosely assembled costumes, with the ensemble convincing throughout (Falter 38/18).