A wide variety of TV shows, old and new, have arrived on DVD this week.

“Vega$: The Third Season, Volume Two” (CBS/Paramount, 1981, three discs, $39.99, 12 episodes, promos). Robert Urich returns for the final dozen episodes of his comic action series about private eye Dan Tanna trying to eke out a living in Sin City. Guests in these episodes include Tony Curtis, Louis Jourdan, Tori Spelling, Wayne Newton, Victor Buono and Edd Byrnes.

“Community: The Complete Third Season” (Sony, 2011-12, three discs, $45.99, 22 episodes, deleted scenes, audio commentaries, featurettes, bloopers). The wacky community college-based sitcom returns for a third off-the-wall season, with Joel McHale and friends (including Chevy Chase) spoofing other shows. John Goodman guests as a dean.

“Dexter: The Complete Sixth Season” (Showtime/CBS, 2011, four discs, $54.99, 12 episodes, featurettes, episodes of “House of Lies,” “Californication” and “The Borgias”). The mild-mannered serial killer (Michael C. Hall) who kills other serial killers goes up against a delusional religious zealot. (Also on Blu-ray, $67.99.)

“Doctor Who: Spearhead From Space: Special Edition” (BBC, 1970, $24.98, four episodes, audio commentaries, featurettes, short spoof, photo gallery, trailers, PDF materials).

“Doctor Who: The Greatest Show in the Galaxy” (BBC, 1988-89, $24.98, four episodes, deleted/extended scenes, audio commentary, featurettes, photo gallery, isolated music, PDF materials). These episodes of vintage “Doctor Who” series feature Jon Pertwee and Sylvester McCoy, respectively, as the time-traveling doctor. Enjoyable adventures with lots of bonus features for die-hard fans.

“Dalziel & Pascoe: Season Six” (BBC, 2001, two discs, $29.98, four episodes). The mismatched British detectives return to investigate the death of a young musical prodigy, the murder of a Sikh woman that has led to racial tensions, the killing of a local solicitor and an unearthed skeleton that casts suspicion on Dalziel.

“Judge John Deed: Season Six” (BBC, 2007, two discs, $29.98, four episodes). Two double-episode military stories wrap up this series about an idealistic English judge (Martin Shaw) whose streak of independence doesn’t always serve him well. Here he tackles a soldier accused of killing Iraqi civilians and then looks into the suicide of another soldier who was given damaging vaccines by the Army.

“The Forsyte Saga Collection” (Acorn, 2002-03, five discs, $79.99, 11 episodes, featurette, photo galleries, text biographies, filmographies and booklist). One of the more formidable “Masterpiece Theatre” presentations of the 2000s was this British costume drama (a remake of a 1967 classic) adapted from John Galsworthy’s epic novels. The two miniseries here — “The Forsyte Saga” and “The Forsyte Saga: Series 2” — chronicle several generations of a wealthy London solicitor’s family. A sterling production with excellent performances.

“American Pickers: Volume Four” (History, 2011, two discs, $19.95, eight episodes). More relics from America’s back roads are collected by this show’s antique retailers and they take an assignment from William Shatner.

“Pawn Stars: Volume Five” (History, 2011, two discs, $19.95, 16 episodes). These episodes are from the third and fourth seasons, as the Vegas pawnbrokers go after everything from samurai swords to classic cars.

“Titanic: 100 Years in 3D” (Blu-ray/3D, 2012, $29.95). Stunning 3D hi-def imagery is the drawing card for this 45-minute documentary, with stories of passengers on the ship that have not heretofore been told.

“Barack Obama: From His Childhood to the Presidency” (Bio, 2011, $19.95). Breezy but interesting look at the president’s life told in a 45-minute documentary.

“The Essential Games of the Philadelphia Phillies” (MLB/A&E, 2012, four discs, $39.95, four games, radio play-by-plays).

“The Essential Games of the Chicago Cubs” (MLB/A&E, 2012, four discs, $39.95, four games, radio play-by-plays).

“The Essential Games of the Texas Rangers” (MLB/A&E, 2012, four discs, $39.95, four games). These sets include four games each that are considered to be the most significant in the history of these respective baseball franchises.

“The Angry Beavers: Season Three, Part Two” (Shout! 1999-2000, two discs, $19.93, 12 episodes). More madness with the animated beaver brothers.

“The Fresh Beat Band: The Wizard of Song” (Nickelodeon/Paramount, 2011, $14.99, two bonus episodes). Jason Mraz and Sarah Chalke guest in this feature-length spoof of “The Wizard of Oz.”

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“Teenage Mutant Ninja Turtles: The Complete Final Season” (Lionsgate, 1996, $14.98, eight episodes, featurette, two bonus episodes). This animated series wraps up in its 10th season with these final episodes.

“Saban’s Power Rangers: Super Samurai: The Super Powered Black Box, Volume One” (Lionsgate, 2011, $14.98, four episodes, music video, character gallery).

“Saban’s Power Rangers: Super Samurai: Super Showdown, Volume Two” (Lionsgate, 2011, $14.98, four episodes, music video, weapons gallery). More shows from the animated Power Rangers franchise.

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