“Back to the Future” marathon (5 p.m., AMC): It’s back-to-back-to-back to the

“Back to the Future” marathon (5 p.m., AMC): It’s back-to-back-to-back to the future as the trilogy is screened in order.

“Boom!” (8 p.m., Fox): Losing contestants are showered with mac ’n cheese. Wow – the water restrictions in California are tough.

“American Takedown” (10 p.m., A&E): This new unscripted series from Morgan Spurlock showcases highly specialized tactical law-enforcement units. In the opener, a dogfighting ring is investigated.

TV listings, B6