“Final Justice” (9 p.m., CBS): Tim Masters is 37, the same age as Peggy Hettrick was

“Final Justice” (9 p.m., CBS): Tim Masters is 37, the same age as Peggy Hettrick was when she was murdered in 1987. Her mutilated, half-naked body was discovered in a field in Fort Collins, Colo., and Masters, who had liked playing with knives and drawing graphic images of death and mutilation, instantly became a suspect. Then 15, he was convicted 12 years later. But his defense attorneys consider him the victim of a relentless investigation by a close-minded cop. His supporters, including some former investigators who initially pursued him, believe this case was built on fear and manipulated evidence. They set out to prove that Masters, sentenced to life in prison for Hettrick’s murder, is innocent. “Final Justice,” a two-hour edition of CBS News’ “48 Hours/Mystery,” airs at 9 p.m.

“Ellen’s Even Bigger Really Big Show” (9 p.m., TBS): On “Ellen’s Even Bigger Really Big Show,” Ellen DeGeneres welcomes a variety of acts from all over the globe, including an illusionist, celebrity impressionists, dancers, comedians and musical acts. Taped at the annual comedy festival in Las Vegas.

“Moonlight & Mistletoe” (9 p.m., Hallmark Channel): A would-be Santa (Tom Arnold) is deep in debt, taking the “ho, ho, ho” out of his holidays.