“I Am Bruce Lee” (8 p.m., Spike) is a two- hour celebration of the actor, martial artist and cultural force. Less than 40 years have passed since Lee’s death in 1973 at the age of 32. “Lee” sets out to prove that his legend has only grown among a younger generation and that his blend of Western and Eastern fighting styles influenced the rise of mixed martial arts and Ultimate Fighting.

Friends, colleagues and admirers interviewed here include Kobe Bryant, Mickey Rourke, boxer Manny Pacquiao, MMA fighter Gina Carano and UFC star Jon Jones, as well as Lee’s widow and daughter.

Lee was well established as a child actor in Hong Kong’s film industry before coming to California. We also learn that he all but fled to the United States after one too many rooftop gang fights in his native land.

Fans of martial arts will appreciate how “Lee” documents its subject’s influence on the sport and his ability to synthesize Eastern philosophies for a broad audience. It’s also worth watching for vintage clips of Lee’s film and television work as well as home movies of his backyard classroom, where he taught Hollywood actors including Steve McQueen and James Coburn.

The film also emphasizes how much Lee’s masculinity and sex appeal meant to an Asian audience weary of weak, demeaning screen stereotypes. The film also shows how Lee’s celebrity and marriage to his white college sweetheart reflected Americans’ changing racial attitudes during the civil rights era.

• “Doomsday Bunkers” (9 p.m., Discovery) is the second cable series to focus on apocalyptic paranoia (and those who profit from it). It profiles a Dallas-based firm that makes deep-earth shelters complete with filtration systems that can protect you against any eventuality.

Tonight’s other highlights

• Hurtful souvenirs on “Whitney” (6 p.m., NBC).

• Finalists perform on the 400th episode of “American Idol” (7 p.m., Fox).

• Hosted by Steve Schirripa, “Nothing Personal: Murder for Hire” (8 p.m., ID) enters its second season of profiling hit men.

• “Revenge for Real” (9 p.m., ABC) recalls a murder in the Hamptons.

• The one-note Fran Drescher comedy “Happily Divorced” (9:30 p.m., TV Land) returns for another season.