“Star Trek: Enterprise” (8 p.m., UPN) wraps up its final season as Archer and crew return to Earth to face the decommissioning of the Enterprise and the signing of a treaty forming the alliance that will become the Federation. But all is not ribbons and galactic diplomacy. The Enterprise engages in one last surprise mission to rescue the kidnapped daughter of the Andorian commander. Jonathan Frakes and Marina Sirtis guest star.

Although “Enterprise” departs the prime-time universe, and the “Star Trek” franchise takes a deserved and overdue break, fans can now buy the DVD set of the series’ first season from Paramount Home Entertainment.

• Viewers who haven’t heard enough about Elvis Presley from the recent two-part “Elvis” miniseries will enjoy “Elvis by the Presleys” (7 p.m., CBS), which features rare home movies, performance footage and interviews with family and friends, most notably Presley’s former wife, Priscilla Beaulieu Presley, and daughter Lisa Marie.

For audiences accustomed to a steady diet of sordid “Behind the Music” exposes, this special has all the earmarks of an official history. But even given the protective and upbeat nature of “By the Presleys,” this is one weird home movie. In fact, odd parallels emerge between Elvis and that of a popular contemporary television character.

Tonight’s other highlights

• Scheduled on a two-hour “Dateline” (7 p.m., NBC): the murder trial of a brunette femme fatale and her lover, accused of murdering Las Vegas founding father and casino mogul Ted Binion. This report includes exclusive interviews with the defendants and jurors.
• Hugh Jackman, Patrick Stewart and Ian McKellen star in the 2000 fantasy “X-Men” (7 p.m., Fox).
• A murder attempt during a bookstore reading brings out the sleuth in the owner (Kellie Martin) and her mysterious assistant (Clarence Williams III) in the 2005 cable whodunit “Mystery Woman: Mystery Weekend” (8 p.m., Hallmark).
• A bus crash springs two violent felons on “Numb3rs” (9 p.m., CBS).
• A smug producer is the lead suspect in an actress’s death on “Law & Order: Trial by Jury” (9 p.m., NBC). Why is NBC airing a repeat of a new series during sweeps? What do they think this is, Saturday night?