ink le ▁during ▁a ▁makes h ift ▁gradu ation ▁ceremony ▁of ▁Trib eca ▁P rep ▁class ▁of ▁ 2 0 1 1 ▁in ▁" W iz ards ▁vs ▁Ast ero ids ". ▁He ▁appeared ▁last ▁time ▁in ▁" Get ▁along ▁Little ▁Z omb ie " ▁in ▁which ▁he ▁was ▁tempor arily ▁turned ▁into ▁a ▁z omb ie ▁after ▁he ▁got ▁bit ten ▁by ▁one ▁during ▁his ▁visit ▁to ▁Alex ▁and ▁Har per ' s ▁a partment . ▁Alex ▁and ▁Mason ▁Grey back ▁turned ▁him ▁back ▁into ▁human ▁again ▁using ▁' Z omb ie ▁bit es ▁treatment ' ▁lot ion . ▁It ▁is ▁shown ▁at ▁the ▁end ▁of ▁the ▁episode ▁that ▁he ▁is , ▁apparently , ▁willing ▁to ▁keep ▁a ▁close ▁relationship ▁to ▁the ▁Rus so ▁family . ▁ ▁Mason ▁Grey back ▁Mason ▁Grey back ▁( Gre gg ▁Sul kin ; ▁seasons ▁ 3 - 4 ) ▁is ▁first ▁mentioned ▁in ▁Season ▁ 2 ▁episode ▁Future ▁Har per ▁when ▁Future ▁Har per ▁tells ▁Alex ▁that ▁she ▁seems ▁ir rit able ▁and ▁asks ▁if ▁she ▁broke ▁up ▁with ▁Mason ▁yet , ▁imp lying ▁that ▁she ▁will ▁date ▁a ▁boy ▁named ▁Mason ▁in ▁the ▁future . ▁ ▁Mason ▁is ▁first ▁fully ▁introduced ▁as ▁a ▁student ▁in ▁Alex ' s ▁art ▁class , ▁and ▁as ▁an ▁English ▁boy ▁who ▁has ▁a ▁cr ush ▁on ▁Alex . ▁They ▁later ▁begin ▁to ▁date . ▁Mason ▁lov es ▁to ▁paint . ▁He ▁gives ▁Alex ▁a ▁neck lace ▁that ▁lights ▁up ▁when ▁the ▁person ▁who ▁we ars ▁it ▁is ▁in ▁love