AT THE TRIPLEX: The fractured family of 'Is This Thing On?' and 'Father Mother Sister Brother'

AT THE TRIPLEX: The fractured family of 'Is This Thing On?' and 'Father Mother Sister Brother'

Relationships don’t end with a bang, but with a whimper. That is the argument being made in Bradley Cooper’s “Is This Thing On?” and Jim Jarmusch’s “Father Mother Sister Brother,” two new comedic dramas coming to The Triplex this week. Cooper begins at the end of Alex (co-writer Will Arnett) and Tess’ (Laura Dern) 20-year marriage in “Is This Thing On?,” introducing us to the couple as they quietly decide to call it quits during their morning ba…