There are so many ridiculous and cringe-worthy aspects of the made-for-TV tell-all “Behind the Camera: The Unauthorized Story of ‘Mork & Mindy'” (8 p.m., NBC) I couldn’t take my eyes off it.

This “Mork” mess puts acting newcomer Chris Diamantopoulos in the awkward and unforgiving position of having to imitate and impersonate Robin Williams, the most dynamic comic actor of his generation. Diamantopoulos acquits himself admirably, but the movie is still absurd.

Williams’ ad-libbing alien is like nothing ever seen on a sitcom. He cracks up his cast mates and outrages the network censors. The show is a hit for the first season, until network suits interfere, fire half the cast and program it opposite Archie Bunker.

“Behind” drags the show through four tortured seasons, too many drug binges and John Belushi’s overdose death. Along the way, we get to see imitations of Pam Dawber (Erinn Hayes), Penny Marshall (Stacy Fair), Raquel Welch (Ona Grauer) and Jonathan Winters (Jeff Skinner).

• “American Experience” (8 p.m., PBS) explores the life and career of Mary Pickford, the silent-era actress known as “America’s Sweetheart” and the first real superstar of the cinema. Laura Linney narrates this bittersweet tale of a fatherless girl whose acting talents made her the breadwinner for her family at an early age.

Pickford’s business acumen and her feisty screen roles spoke to the movie-going public at a time when women were first getting the right to vote. Sadly, Pickford’s youth began to fade just as movies adopted sound, and the silent superstar would spend the last four decades of her life as a reclusive has-been.

Today’s other highlights

• A cartoon about a canine with special powers, “Krypto the Superdog” (8 a.m., Cartoon Network), premieres.
• A widow’s home remodeled on “Extreme Makeover: Home Edition: How’d They Do That?” (7 p.m., ABC).
• The NCAA Basketball tournament (8 p.m., CBS) concludes.
• The president wants to face the nation on “24” (8 p.m., Fox). Attention “24” fans! Fox considers this episode so pivotal that it will repeat it on Friday and Sunday evenings.
• Alexa Vega stars in “Odd Girl Out” (8 p.m., Lifetime), a drama about teen girl bullies.