How well can you ever really know your family? If you are Jonathan Holiff, there is only one option — perpetual discovery. Following his father Saul’s suicide, Holiff finds hundreds of letters, audio diaries and recorded phone calls the late music manager had with his client Johnny Cash. Embarking on a moving journey to know his father, Holiff creates a documentary with heart and perhaps some healing. Fri. Various times. $11 (general admission), $8 (ages 11 and under, 62 and over, bargain matinee). Music Hall 3, 9036 Wilshire Blvd., Los Angeles. (310) 478-3836.