Watch The Mighty Underdogs Episode 1 HD Full Free on SolarMovie. Watch The Mighty Underdogs tv series online free. Every year, thousands of young dog handlers and their canine BFF's enter the Junior Showmanship ring...Every year, thousands of young dog handlers and their canine BFF's enter the Junior Showmanship ring hoping to take home a coveted win. Follow them as they get closer to their dream -- going to Westminster.