Episode Name: Wizards of Apartment 13B
Air date: 10/7/2011
Summary: Alex and Harper move into an apartment building with a secret 13th floor for wizards and other mythological creatures. Alex believes she’s finally moving from her werewolf ex-boyfriend, Mason, until she discovers that he now lives on the same floor and will stop at nothing to win her back.
Watch or download Wizards Of Waverly Place – Season 4 Episode 21 – Wizards of Apartment 13B at below links.