Future Harper (Season 2, Episode 16)

Alex, Justin and Max discover that a famous author (Rachel Dratch) is using their lives as the premise for her best-selling book series, Charmed and Dangerous. However, the wizards are shocked learning that the author, H.J. Darling, is really Harper from the future. She traveled back in time to write about wizards, since in the future they have been outed and are not so interesting because everyone already knows wizards exist which somebody in that room had a big, big mouth and exposed them. Alex is enraged that Harper has been writing books about her without permission. Future Harper tells Justin that he must convince Alex to give Past Harper permission to write the series. In the end of the episode, Selena Gomez and Rob Reiner comically talk about the importance of reading.

Alex in the Middle (Season 1, Episode 16)

Jerry's wizard brother, Kelbo Russo, visits. He shows the kids a different style of wizard training (actually letting them use their powers). Finding Kelbo more fun than Jerry, Alex appoints him her wizard teacher over her own father, but Kelbo quickly proves to be just as childish and irresponsible with his powers as Alex is with her own, and ends up endangering them both. They are saved by Jerry, who reveals a secret that he had kept from them: he originally defeated Kelbo in the wizard competition, but, as wizards are forbidden to marry mortals, gave them up to Kelbo anyway in order to marry Theresa.