Tonight at 8 on Twin Cities Public Television, reporter Mary Lahammer files “3 Big Moments,” a half-hour profile of US Senate candidates Dean Barkley, Al Franken and Sen. Norm Coleman. The subject of the Barbara Walters-style interviews with the pols and their families is not issues or the back-and-forth of the long campaign, but three decisive moments in each man’s life.

Notable: Dean Barkley discusses publicly for the first time his battle with drinking and depression after he returned from his two-month stint in the US Senate following the death of Sen. Paul Wellstone in October 2002, and Norm Coleman is asked to address longstanding rumors about his marriage and whispers of infidelity.

You can tune in, or set your Tivo/DVR for 8 pm on Channel 2 or Channel 440 on local cable systems.