Two award-winning films comprise this collection from the hot young Hollywood filmmaker. Pi (Sean Gullette, Mark Margolis. 1998/84 min.) is the story of a mathematician obsessed with finding a key number that holds the secret to all existence. Requiem for a Dream (Ellen Burstyn, Jared Leto. 2000/102 min.) tells the punishing tale of four people whose lives spiral demonically out of control as they succumb to their drug addictions. 2 DVDs. Color/R.