Perhaps television's most compelling female figure of recent years, Helen Mirren as a dogged detective chief inspector in London, returns in a welcome repeat on the PBS series "Mystery!" Also tonight, a CBS news documentary questions the safety of the space shuttle.
* "Family 2 Family" (8 p.m.-8:30 p.m., WMAR, Channel 2) -- In a repeat screening of a local special from March, anchors Mary Beth Marsden and Stan Stovall offer profiles of Maryland families facing unusual challenges. The show also includes a studio discussion of sex and other issues by local teens.
* "Mystery! Prime Suspect 2" (9 p.m.-10 p.m., MPT, Channels 22, 67) -- Continuing a reprise of the captivating cases of Scotland Yard detective Jane Tennison (Helen Mirren), the series launches into its second set of episodes. In the first of four installments, construction workers unearth the charred body of a teen-age girl, and the squad begins probing a seamy world of racism and class-consciousness. PBS.
* "Eye to Eye" (9 p.m.-10 p.m., WJZ, Channel 13) -- Citing information from a former safety inspector, correspondent Roberta Baskin reports that a contractor working on the NASA space shuttle may be ignoring serious problems affecting its engines -- problems that could cause another explosion like the 1986 Challenger tragedy. CBS.
* "New York Undercover" (9 p.m.-10 p.m., WBFF, Channel 45) -- In a plot line with real-life parallels in his hometown, Baltimore-born Howard Rollins "(In the Heat of the Night") guest stars in this repeat as a Harlem minister who objects to heavy cigarette advertising in his neighborhood. Fox.
* "48 Hours" (10 p.m.-11 p.m., WJZ, Channel 13) -- Chronic pain from a variety of causes afflicts close to one-third of all Americans, contends the newsmagazine show. How do they cope? CBS.
* "The Sandlot" (6 p.m.-8 p.m., Cinemax) -- A nice family film that deserved better at the box office in 1993, the movie presents a nostalgic salute to summer, baseball and fearsome dogs. A pickup team of ball players gives a newcomer (Tom Guiry) a place to belong, and the special effects depicting a huge mastiff that claims a baseball knocked over the fence are a hoot.
* "MTV Movie Awards" (9 p.m.-11 p.m., MTV) -- Taped last week in Burbank, the rock video channel's annual film fete features Jon Lovitz and Courtney Cox as hosts -- and a number of award categories you won't find at the Oscars, such as "Best Kiss" and "Best Dance Sequence."