sentences:  Vack graduated from the University of Southern California, where he studied Theater.Vack made his acting debut in the short film "Dear Diary" (1996), which won the Academy Award for Best Live Action Short Film.Vack has guest-starred in single episodes of "Hope & Faith" (2004), "Third Watch" (2004), "" (2005), "Ghost Whisperer" (2009), and "Cold Case" (2010).