Donor Unknown is a documentary feature following the journey of JoEllen Marsh as she goes in search of the sperm donor father she only knows as Donor 150.
JoEllen, now 20, has always known her family ‘wasn't like other families'. She grew up in Pennsylvania with two mothers, and a burning curiosity to know more about her anonymous donor father. When JoEllen discovers a unique online registry which connects donor-conceived children, she manages to track down a half-sister in New York. The New York Times picks up the story, and, over time 12 more half-siblings emerge across the United States.
The article also falls into the hands of Jeffrey Harrison, living alone with four dogs and a pigeon in a broken-down RV in a Venice Beach car park. In the 1980s, Jeffrey supplemented his meagre incoming by becoming a sperm donor at California Cryobank. His number was Donor 150.