Fans of “House” should enjoy “Blue/Orange” (5 p.m. today, BBC America), a provocative movie adaptation of an acclaimed British stage drama making its American TV debut. Like “House,” this film involves nonstop arguing about a medical diagnosis – in this case, a psychiatric one – that reveals as much about the doctors as the patient.

A disturbed young black man, Chris (Shaun Parkes, “Casanova”), finds himself hospitalized for a borderline personality disorder. His therapist, Dr. Bruce Flaherty (John Simm), thinks another month of institutionalization would do him good. But his medical mentor, Dr. Robert Smith (Brian Cox, “Match Point”), advises that Chris be released and even suggests that psychiatric treatment, and Flaherty’s care in particular, may be his biggest problem.

In this smart, engaging if talky drama, one is never quite sure about the characters’ true natures or motivations. Is Chris really the illegitimate son of deposed Ugandan dictator Idi Amin? Or is that story merely a product of his delusions? Is Flaherty an idealistic caregiver or a neurotic control freak? Is Smith a thoughtful older man given to poetic insights or a callous, ambitious phony taking the path of least resistance? Looking for rewarding television? Don’t miss this.

¢ In 2003, CBS took extreme heat for scheduling a TV film called “The Reagans” starring James Brolin and Judy Davis as Ron and Nancy. The film’s warts-and-all depiction of the first couple outraged many who had never even seen the film. CBS caved to political pressure and shelved the project. It eventually aired on Showtime.

Viacom (the corporate owner of CBS, Showtime and CMT, among other media entities) appears to think that penance and expiation are still in order. The new biography series “True Grit” (8 p.m. today, CMT) kicks off with a profile of Ronald Reagan that sets a whole new standard for uncritical hero worship.

The “True Grit” series combines the familiar “Biography” format with a country music score that alternates between strident patriotism and unbridled sentiment.

¢ “Nature” (7 p.m. Sunday, PBS) follows up one of its most popular shows, the 2000 “Animals Behaving Badly,” with the new special “Animals Behaving Worse.”

This whimsical hour offers funny true stories about the awkward intersection of wild animals with the human residents of sprawling suburbs.

¢ Some consider Bobby Knight one of the greatest basketball coaches ever. Others see him as an abusive chair-hurling maniac representing sports at its worst. Now he’s the star of his own sports reality series “Knight School” (9 p.m. Sunday, ESPN). Knight serves as the Simon Cowell of the hardwood, judging 16 basketball amateurs from Texas Tech trying out for a walk-on position with the team.

As you can imagine, “School” offers an almost instantaneous collision between the brash young men and the stern, disciplinarian coach.