Broderick was born in Manhattan, New York, the son of Patricia (née Biow), a playwright, actress, and painter, and James Broderick, an actor and a World War II veteran. His mother was Jewish, a descendant of Jewish immigrants from Germany and Poland. His father was a Catholic of Irish, and some English, descent. Broderick attended grade school at City and Country School in Manhattan and high school at the private Walden School, also in Manhattan. He received acting training at HB Studio.
- "Josh vs. the Apocalypse: Part 1"
- "Schmuck Bait!"
- "The Slime Queenpin of Glendale, CA"
- "Homecoming Redux or My So Called Stunt Double Life"
- "Canta Tu Vida"
- "Post Mates"
- "Josh vs. the Apocalypse: Part 2"
- at the