BRITISH soprano Lesley Garrett keeps the ball in play tonight in the terrific Who Do You Think You Are? ( 7.30pm, SBS). As with Kate Ceberano, musical talent appears to run in her family through several generations. This is followed by Science: Hypochondriacs ( 8.30pm) in which Norway’s Dr Wilhelmson treats hypochondriacs in his Bergen clinic. His method is to engage in a philosophical discussion about the way people relate to life and death. Imaginary diseases, it seems, are far more destructive and costly than imaginary friends. More difficult to treat, as well. Begorrah, though it’s not St Patrick’s Day until March 17, Songs of Praise ( Sunday, 11.30am, ABC1) lets Eamonn Holmes visit Croagh Patrick, Ireland’s holy mountain in County Mayo, so he ( and we) can follow in the footsteps of the country’s patron saint. Sticking with Aunty, ABC1 also has a repeat of the remarkable Genius of Photography ( Sunday, 3pm). The series, first shown on ABC2, looks at the history of photography in all its manifestations, including journalism, advertising, art and portraiture. Speaking of realism, The Real Sea Change ( Wednesday, 8pm, Seven) catches up with those who have left it all behind to see if a new locale will change everything else enough to make them happy. John Howard, moonlighting from All Saints , follows restaurateurs Ian and Catherine to Canada, and a Brisbane couple make a tough decision to move to Tasmania.