The ninth season of High School Quiz Show premieres this Saturday with defending champs Lexington High School taking on the Advanced Math & Science Academy of Marlborough. The season ends with the first ever High School Quiz Show: Invitational, in which the Massachusetts champions will face off against the winners of High School Quiz Show in Maine, Rhode Island and New Hampshire. Quiz Master Billy Costa joined Jim Braude to talk about what we can expect in the new season … and to see what it’s like on the other side of the buzzer.

You can watch High School Quiz Show Saturdays at 6 p.m. on WGBH-2.