Thank You for Coming

At age 29, filmmaker Sara Lamm discovers she was conceived via an anonymous sperm donor. Working with only a handful of clues, she finds Jennifer, a woman – potentially Sara's biological sister – who was conceived at the same hospital, at the same time in the 1970's. What's more, Jennifer has managed to chart a complex family tree through her sophisticated use of at-home DNA tests and online genetic ancestry databases. (Los Angeles Film Festival)