'Who am I?' This is where Jared Rosenthal and his assistant, medical technician Ana Lopez, step in - he owns and operates the 'Who's Your Daddy' DNA testing truck. When the clinic on wheels hits the streets, people often gawk, laugh, snap photos, and have even been known to jump out of their cars at traffic lights. The truck sparks reactions wherever it goes, from Manhattan to the Bronx - plus on road trips to New Jersey, Maryland, DC, Chicago, and beyond. When clients climb aboard, they are often seeking answers to burning questions they have kept buried deep inside of them - sometimes for decades. They reveal the doubts that keep them awake at night, and ask for Jared's help in putting an end to their most personal mysteries. From astonishing stories like "I think I was kidnapped at birth and have found my mother" and "I think the man I'm dating might be my brother," to personal revelations such as "I may have found my sperm donor father," to touching stories like "I think I have a twin sister" there are no limits to the variety of questions people have about their DNA - right in the middle of traffic.