FX’s thriller The Strain returned on Sunday for the start of its second season. At this year’s San Diego Comic-Con, executive producers Carlton Cuse and Chad Hodge, and stars Miguel Gomez (“Augustin ‘Gus’ Elizalde”), Ruta Gedmintas (“Dutch Velders”), Corey Stoll (“Dr. Ephraim Goodweather”), Richard Sammel (“Thomas Eichorst”), Mía Maestro (“Dr. Nora Martinez”), Natalie Brown (“Kelly …