News flash: Another cable network tries to pass off superstitious nonsense as documentary programming. “The uneXplained” (9 p.m. and 9:30 p.m. Saturday, BIO) profiles people who turn to “alternative” methods to treat medical problems, solve mysteries and explain phenomenon “beyond the physical world.”

In the first episode, “Disappearance at Dead Man’s Curve,” the family of a missing man turns to a psychic detective. In the second helping, “My Mysterious Seizures,” a desperate woman turns to a shamanic healer.

• Documentary stunt-master Morgan Spurlock invites folks to survive in the wild using only tools available to our Neolithic ancestors on “I, Caveman” (8 p.m. Saturday, Discovery). This is not to be confused with the 2007 ABC comedy “Cavemen,” a short-lived bomb based on GEICO commercials.

• A former star of “Saturday Night Live” gets his own standup special on “Kevin Nealon: Whelmed … But Not Overly” (9:30 p.m. Saturday, Showtime). Nealon makes observations about his recent status as a new father and the insecurities that entails. Look for more topical commentary on cellphone etiquette and “sexting.”

Nealon is a regular on Showtime’s “Weeds” (10 p.m. Sunday), now in its eighth and final season.

Saturday’s other highlights

• The 2012 Pro Football Hall of Fame Induction (6 p.m., ESPN).

• Tonight’s scheduled events at the XXX Summer Olympics (7 p.m., NBC) include track and field, swimming, diving and beach volleyball.

• Eddie Murphy stars in the 2007 comedy “Norbit” (7 p.m., ABC).

• Visitors feel unwelcome on “My Cat From Hell” (7 p.m., Animal Planet).

• Nobody’s safe in the 2012 shocker “Shark Week” (8 p.m., Syfy).

• The 2012 documentary “Marley” (8 p.m., VH1) recalls pioneering Jamaican reggae star Bob Marley.

• A brain operation creates an amnesiac on “Dark Matters: Twisted but True” (9 p.m., Science).