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The series has many supporting characters, including faculty members, students and relatives of the glee club members.
Broadway stars including Idina Menzel, John Lloyd Young, Jonathan Groff, Phoebe Strole and Kristin Chenoweth have been featured in guest roles.
For the second season, formerly recurring cast members Mike O'Malley, Heather Morris and Naya Rivera were promoted to the main cast.Later that week, I started work." The two remain a couple for most of the season before breaking up.In the third season, Artie, then a junior, directs the school musical and a television special featuring the glee club for the local PBS station.Wade "Unique" Adams (Alex Newell) is a recurring character in seasons 3, 4 and 6, and a main character in season 5.She first appears in the third-season episode "Saturday Night Glee-ver" as a new featured singer in Vocal Adrenaline who is a fan of both Mercedes and Kurt despite being a competition rival.