In the first season, he was shirtless(if you count the opening that we never see in the pilot)....at least about three times...

One with Micheal Pearlman during the shaving scene

Another in the opening credits of the 1st Season of CIC.

Spring Break is one..

Exactly how many times was Baio shirtless in CIC?

NOT ENOUGH !!! lol I really never counted the times he had no shirt on, there were times his shirt was open, too.

They also had the final open shirt scene in the 5th Season where Scott is doing that spin the chair with all the hot women and nearly kisses Nicoles..thinking it is one of the hot women, he removes his blindfold.

I don't think Scott was working out as much when CIC was filming. He looked much smaller in the few shirtless scenes that were done. He was way more muscular in Happy Days and Joannie Loves Chachi. I saw him shirtless in Diagnosis Murder and he looked really shockingly small. I saw some recent shirtless pictures of him and he looks huge again. His arms were ripped.

Funny thing to notice a slight goof in Spring Break. When Jennifer Runyon walks in the hotel, her mouth is gapping wide open at Scott. I noticed she blushed a bit when she is trying not to become infatuated. She did blush a bit. It's true. Even when she and Scott kissed, you noticed how red their face became so quickly. You know, the episode with the experiments.

I think Scott had trouble maintaining his weight, he was so active, he seemed to loose it quickly. A perfect example...here's a picture of him from "l lOVE NY" it was filmed in 1987 while he was doing CIC, he didn't keep the bulk very long, you never see him that big on the show.

He never looked hotter than he did in I Love NY. It was like he was chiseled out of stone in perfection. Look at those muscular arms and that chest. He was amazing!

*note to self* watch "I love NY" THIS WEEKEND!! :D