 The next two decades, including his TV show, was one higher plateau after another. And since retiring from TV, Seinfeld's work has been more mixed. But because comedy has been for him a lifelong pursuit, the highs and lows wash away. He controls what he can control. And he trusts that putting in the work every day will yield results. And at age 70, he's still performing and trying to perfect the craft. Okay, here you go, Seinfeld fans. You know why? You know what? You know what he did?