Kristin Davis stars and executive produces the cable movie “Of Two Minds” (Lifetime, 8 and 10 p.m.), about a woman who suddenly has to care for her schizophrenic sister after their mother dies.

Tammy Blanchard of “Moneyball” chews up some scenery as the afflicted sister, and the movie tends to run from mad scene to calm down to mad scene. It all depends on the meds.

It’s not often that mental health is dealt with seriously or at all in film, and we are reminded of one of the other times as Louise Fletcher, who won an Oscar in “One Flew Over the Cuckoo’s Nest” appears as well.

A new generation’s Fab Four tries to salute a previous one’s in “BIg Time Rush: Big Time Movie” (Nickelodeon, 8 p.m.) in which the made four TV music group goes on a spy caper and covers Beatles songs from “Help!” to “We Can Work It Out” with the kind of detail that will fly right over the head of Big Time Rush fans and do little but further annoy their parents.

The used to call them the Blue Collar Comedy Guys but the special featuring Bill Engvall, Jeff Foxworthy and Larry the Cable Guy is called “Them Idiots Whirled Tour” (CMT, 7 p.m.).

“Q’Viva” (Fox, 8 p.m.) turns out to be one of the more entertaining talent shows around, with its vast scope of entertainment and its travel budget that takes it across South and Central America.

New to premium cable tonight are the 2011 movies “Pirates of the Caribbean: On Stranger Tides” (Starz, 9 p.m.) and “The Eagle” (Starz, 10 p.m.).

A new season starts for the kind of creepy “Must Love Cats” (Animal Planet, 8 p.m.).

Clifton Webb is the featured star on Turner Classic Movies with “The Razor’s Edge” (8 p.m.), “For Heaven’s Sake” (10:45 p.m.),  “Mister Scoutmaster” (12:30 a.m.), “Sitting Pretty” (3;15 a.m.) and “Boy on a Dolphin” (4:45 a.m.).

Lots of action in men’s college basketball with Vermont at Stonybrook (ESPN2, 11 a.m.) in the America East tournament final, Memphis vs. Marshall (CBS, 11:30 a.m.) in the Conference USA tournament final, North Carolina vs N.C. State (ESPN, 1 p.m.) in the ACC tournament semifinal, Massachusetts vs. St. Bonaventure (CBS Sports, 1 p.m.) in the Atlantic 10 tournament semifinal, Florida vs. Kentucky (ABC, 1 p.m.) in the Southeastern Conference tournament semifinal, Michigan State vs. Wisconsin (CBS, 1:40 p.m.) in the Big Ten tournament semifinal, McNeese State vs. Lamar (ESPN2, 3 p.m.) in the Southland Cofnerence tournament final, Xavier vs. Saint Louis (CBS Sports, 3:30 p.m.) in the Atlantic 10 tournament semifinal, Ole Miss vs. Vanderbilt (ABC, 3:30 p.m.) in the Southeastern Conference tournament semifinal, Michigan vs. Ohio State (CBS, 4 p.m.) in the Big Ten tournament semifinal, Baylor vs. Missouri (ESPN, 6 p.m.) in Big 12 tournament final, Colorado vs. Arizona (CBS, 6 p.m. in the Pac 12 tournament final, New Mexico vs. San Diego State (NBC Sports Network, 7 p.m.) in the Mountain West tournament final, Ohio vs. Akron (ESPN2, 8 p.m.) in the Mid-American Conference tournament final, Texas Southern vs. Mississippi Valley State (ESPNU, 8 p.m.) in the SWAC tournament final, Cincinnati vs. Louisville (ESPN, 9 p.m.) in the Big East tournament final, UC Santa Barbara vs. Long Beach State (ESPN2, 10 p.m.) in the Big West tournament final and Louisiana Tech vs. New Mexico State (ESPN2, midnight) in the Western Athletic conference tournament final.

Steve Earle plays “Austin City Limits” (PBS, 9 p.m., check local listings).

Jonah Hill hosts a new “Saturday Night Live” (NBC, 11:30 p.m.) with The Shins as musical guest.