Friday’s revolving door continues to spin, bringing early exits for two series tonight. The sixth season of “Numb3rs” (9 p.m., CBS) concludes with wedding bells for Charlie and Amita, followed by a honeymoon interrupted by some serious sleuthing.

The real mystery of tonight’s show is whether “Numb3rs” will return for a seventh season of math-based crime solving. CBS has not made any announcements to date, but it’s safe to conjecture that when a series concludes this soon, the chances for renewal do not exactly add up in its favor.

• “Supernanny” (ABC) also closes up shop this evening, with Jo helping a professional woman juggle work and motherhood (7 p.m.) followed by a clip-show retrospective (8 p.m.) of the sixth season’s most difficult cases. This also happens to be the 100th “Nanny” for those keeping score at home.

• “Smallville” has made way for second helpings of “America’s Next Top Model” (7 p.m., CW) and the atrocious “High Society” (8 p.m., CW), a reality series about members of the debutante set behaving very badly.

• Viewers looking for a palate cleanser after surveying the wreckage of “High Society” would do well to check out the 1990 drama “Metropolitan” (9 p.m., Sundance). The first film from director Whit Stillman, it is set in the same preppy, privileged milieu as “Society” and “Gossip Girl,” but eschews scandal and easy stereotyping for a portrait of a group of bookish, thoughtful, if occasionally bloodless young people well aware of their place in both “Society” and society. It’s an engaging look at a particular subculture from a sympathetic perspective.

• TCM offers a night of shockers showcasing the cutting-edge budget special effects of mid-20th-century genre films. Nuclear testing unleashes a long-dormant prehistoric creature in the 1953 shocker “The Beast from 20,000 Fathoms” (7 p.m.), followed by the similarly themed “It Came from Beneath the Sea” (8:30 p.m.), made two years later. Monsters from drier circumstances loom large in the 1957 feature “The Monster that Challenged the World” (10 p.m.) and the 1954 classic “Them!” (11:30 p.m.), a creature feature starring James Arness, James Whitmore and Edmund Gwenn.

Tonight’s other highlights

• Melinda battles for a pint-sized poltergeist trapped in a haunted house on “Ghost Whisperer” (7 p.m., CBS).

• Emmitt Smith goes on a voyage of genealogical discovery on “Who Do You Think You Are?” (7 p.m., NBC).

• While the 2009 Coen brothers feature “A Serious Man” did not win the Best Picture Oscar, many have praised its audacious originality. The same could be said for their 2000 epic “O Brother Where Art Thou?” (6:30 p.m., VH1), a modest box-office hit that spawned a hugely popular soundtrack album.

• Fleet Foxes, Manchester Orchestra and singers P.J. Harvey and John Parish appear on “Live from Abbey Road” (7 p.m., Sundance).

• “Car Toons” (7:55 p.m., Disney) offers a brand-new five-minute mini-feature.

• “Medium” (8 p.m., CBS) flashes back to Joe and Allison’s wedding day, as the bride-to-be feels increasingly burdened by her recurring visions.

• Amanda sees her deceased brother on “Caprica” (9 p.m., Syfy).

• Crixus feels cranky about his rival’s exalted status on “Spartacus: Blood and Sand” (9 p.m., Starz).