The quarterly “UFC Road to the Octagon” preview show returns Sunday to spotlight the upcoming UFC on FOX 8 headliner between flyweight champion Demetrious Johnson and challenger John Moraga . The event takes place July 27 at Seattle’s KeyArena. The FOX-televised main card airs on FOX following prelims on FX and Facebook. “UFC Road to the Octagon” debuts Sunday at 2:30 p.m. ET/11:30 a.m. PT, though you should check your local listings since the times may vary in certain locations