Quiz: Which Douglas did it?

Hollywood legend Kirk Douglas passed away during the week at the age of 103. He did a lot during his life, including fathering 4 sons with 2 different women.

All 4 sons carved out some form of career for themselves in the entertainment business, being involved in acting, directing, producing, and even stand up comedy.

So what we want you to tell us is, which Douglas did it? Was it Kirk, or one of his sons Michael, Peter, Joel or Eric??