“Doctors On Call,” a production of WDSE/WRPT-Channel 8, offers medical advice to public television viewers. This season’s programs feature physicians from Essentia Health. It airs at 7 p.m. Thursdays and viewers can call in questions at (218) 788-2844 or (877) 307-8762. Tonight's program focuses on stroke and other neurological problems and features Essentia Health Neurologist Wolcott Holt, MD.