Elementary: Sherlock Holmes and the medical mystery

You just saw him play Sherlock Holmes on the hit CBS primetime drama Elementary but in real life Jonny Lee Miller is trying to crack a cold case on a deadly childhood disease and there is nothing elementary about that.

His super sleuth skills help him solve crimes. However, it is the mystery behind a rare deadly childhood disease that had Jonny Lee Miller on Capitol Hill Thursday pushing Congress to help fund research for treatment and a cure.

"It's my first time in DC actually, it's a huge honor. It's very humbling as well to sit in a room and listen to people with much more to contribute than I have," Miller said.

Miller made this his mission after a crew members' son about the same age as his own little boy was diagnosed. "Sometimes you've just got to help the person standing next to you, right?," he says.

Five-year-old Jonah Weishaar has San Filippo syndrome. He is missing a key enzyme that essentially can lead to major problems with the Central Nervous System.

Jill and Jeremy hope clinical trials will lead to a cure. Miller will not stop until there is one.

"I wasn't out, I wasn't out looking for a cause. But there was one right next to me right there. And I think that," Miller says. "And I think that that should happen more in the world if you pay attention to your surroundings, you know. And realize well what's the..I can't personally solve this problem. But I can do a little piece, a little bit."

2x18 "The Hound of the Cancer Cells"

When a famous cancer researcher is found dead, Holmes and Watson must determine if the scientist's untimely demise was tied to his latest cutting-edge invention. Meanwhile, Bell is finally cleared to re-enter the field.

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