Watch Sadisflix. Enjoy an all-American celebration of what may be the country's most popular fast food. From Connecticut to South Carolina to California, Rick Sebak visits some of the nation's coolest hot dog places, taking viewers inside a giant hot dog-shaped building, stopping at some crazy late-night stands, and looking at how hot dogs are made. Wonder how and when hot dogs became so popular-or what toppings are tops these days? Tune in and find out.