Season 1 Netflix, 2018 Watch now 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. Season 2 Netflix, 2018 Watch now For best friends Alexa and Katie, sophomore year brings budding romance, a birthday milestone -- and big lessons they'll never forget. Season 3 Netflix, 2019 Watch now Junior year is finally here for Alexa and Katie with new relationships, surprising friendships and big decisions on the horizon. Season 4 Netflix, 2020 Watch now