Air date: 2018-03-23

Alexa is battling cancer. But with her best friend, Katie, by her side, she's also starting high school -- and ready for whatever comes next.

Air date: 2018-12-26

For best friends Alexa and Katie, sophomore year brings budding romance, a birthday milestone -- and big lessons they'll never forget.

Air date: 2019-12-30

Junior year is finally here for Alexa and Katie with new relationships, surprising friendships and big decisions on the horizon.

Air date: 2020-06-13

Summer's over, and Alexa and Katie are starting their senior year. They've been through so much together — but there's still more to come.