“Deadliest Catch” (8 p.m., Discovery) explores a tale of a captain at war with his crew, a theme much explored in films like “Mr. Roberts,” “Mutiny on the Bounty” and “The Caine Mutiny.”

Beset with a meager crab harvest, Capt. Derek Ray is rather fed up with the hands on the Cornelia Marie. As replacement for the late Phil Harris, he has run up against the attitudes of his men, including the sons of the late skipper who also have an ownership stake in the Cornelia Marie.

Convinced that Jake Harris has been furtively smoking marijuana below deck, Capt. Ray takes the extreme, but apparently all but mandated, step of calling the Dutch Harbor cops on the disgruntled youth.

It would be giving away too much to reveal the fates of Harris the Younger or the wrapped-too-tight Capt. Ray. Suffice it to say, the crab haul is the last thing on their minds when they hit the harbor.

• A season of competition concludes on “Dancing with the Stars” (8 p.m., ABC) on the same night that the two last contestants sing to survive on “American Idol” (7 p.m., Fox).

Those fretful that such showcases are ending can take solace in the fact that “The Voice” (8 p.m., NBC) — guest-starring Reba tonight — is still in full swing. And “So You Think You Can Dance” begins its summer season on Thursday.

• “Frontline” (8 p.m., PBS, check local listings) presents “Wikisecrets,” exploring the largest leak of classified documents in American history. It profiles Wikileaks founder Julian Assange and Army intelligence analyst Bradley E. Manning, who is currently charged with funneling secret documents to Assange’s site.

• DVDs available today include the five-DVD set “The Unknown War,” a 20-episode 1978 documentary series about the epic World War II battles between Nazi Germany and the Soviet Union. Burt Lancaster hosts and narrates.

Also available today is “The Best of the Dean Martin Variety Show,” a time capsule of topical comedy from talent ranging from Rodney Dangerfield, Dom DeLuise and Nipsey Russell to Woody Allen and Orson Welles. Martin’s show ran from 1965 to 1974 and featured hundreds of comics, musicians and dancers from that period.

Tonight’s other highlights

• “Glee” fans can anticipate the season-ender with the 1963 musical “Bye Bye Birdie” (3:30 p.m., TCM).

• A winner of sorts emerges on “Biggest Loser” (7 p.m., NBC).

• “Craft in America” (7 p.m., PBS, check local listings) explores various local styles.

• Poppy Montgomery stars in the 2005 true-life tabloid tale “Murder in the Hamptons” (7 p.m., Lifetime Movie Network). Good trashy fun.

• The Nationals bring the gang to New York City on the season finale of “Glee” (8 p.m., Fox).

• A sergeant’s murder resonates on “NCIS: Los Angeles” (8 p.m., CBS).

• A Tennessee town adjusts to rapid changes in population due to immigration and other demographic shifts on “Welcome to Shelbyville” on “Independent Lens” (9 p.m., PBS, check local listings).