Quick! How many of the original members of the Lovin' Spoonful can you name?

Let's see ... well, obviously there's John Sebastian. And that, ah, Zak guy. (Editor's note: you're thinking of guitarist Zal Yanovski.) And ... that's it. I'm out.

Exactly. That's because Sebastian sang and wrote (or co-wrote) the vast majority of their Rock 'n' Roll Hall of Fame-status catalog — including "You Didn't Have to be So Nice," "Daydream," "Summer in the City," "Do You Believe in Magic?" and "Rain on the Roof."

Yes, Sebastian — who performs Saturday at the Katharine Hepburn Cultural Arts Center — is also the dude behind the "Welcome Back, Kotter" theme song. He's got a wealth of material and a genuine and witty stage presence. Should be a fun and nostalgic show.

John Sebastian, 8 p.m. Saturday, Katharine Hepburn Cultural Arts Center; $62-$65; 1-877-503-1286, thekate.org.