One

"One" is the first episode of the HBO limited series I Know This Much Is True.

Synopsis
Official episode synopsis for "One" from HBO:


 * After paranoid schizophrenic Thomas Birdsey has a violent public breakdown, Dominick Birdsey finds himself stepping up to defend his identical twin brother in unexpected ways.

Cast and characters
Starring:
 * Mark Ruffalo as Dominick Birdsey and Thomas Birdsey