Quinn is getting more anxious by the minute as she expects the baby, plus, Regionals is finally here, but will the Glee Club be able to triumph over Sue Sylvester’s plots?

Mr. Schuester thinks he has gotten the upper hand over Sue; Quinn gets in touch with her “funky” side.

Mr. Scnuester encourages the members of glee club to express themselves using Lady Gaga’s music; Rachel has a life-changing encounter; Tina embraces her inner goth.

Will’s high school rival, special guest star Neil Patrick Harris, returns to McKinley to bring down the glee club. Elsewhere, Artie’s dreams are exposed.

A sore throat impacts Rachel’s singing; Kurt tries to impress his father; Puck hopes to elevate his social status.

Mr. Schuester investigates when a salacious list about the glee club members circulates the school; a video surfaces of Olivia Newton-John performing with Sue.

Kurt sets his dad up with an unexpected partner; April (Kristin Chenoweth) returns to save the glee club.

Mr. Schuester is concerned that the guys are disrespecting the women of the glee club; the club members perform some of Madonna’s greatest hits.

Rachel and Finn’s romance hits a rocky patch when she becomes involved with a competitor (guest star Jonathan Groff), forcing Mr. Schuester to have a talk with the competitor’s coach (guest star Idina Menzel).

Quinn’s secret unravels as the sectionals approach, threatening club cohesion at the worst possible time. Meanwhile, Sue’s scheming continues apace (and then some); and Will ponders an important decision as Emma and Ken’s wedding nears.