Here's how Fox described the episode: "Under Artie’s (Kevin McHale) directorial leadership, the kids prepare to perform the school musical West Side Story. Meanwhile, Finn (Cory Monteith) meets with a recruiter, and Coach Bieste (Dot-Marie Jones) has an admirer."

Also on the latest episode, Blaine (Criss) was introduced to Sebastian Smithe, played by Grant Gustin, who came to "Glee" straight off the national tour of West Side Story. When Sebastian and Blaine met for coffee after their "Uptown Girl" performance, Kurt (Chris Colfer) began to realize that Sebastian is up to no good.

Meanwhile, at McKinley High, the students   took on the Leonard Bernstein-Stephen Sondheim-Arthur Laurents classic, West Side Story. The "Glee" episode showcased West Side performances of "America," "One Hand, One Heart" and "A Boy Like That."

On the next episode, "Mash Off," according to Fox, "Sue (Jane Lynch) starts a smear campaign to take down her biggest competitor for the Congressional seat. Meanwhile, Puck (Mark Salling) has a crush, and Will (Matthew Morrison) and Shelby Corcoran (Idina Menzel) encourage some friendly competition." The episode is scheduled to air on Fox Nov. 15.

"Glee" airs Tuesday nights on Fox at 8 PM ET. To watch the "Uptown Girl" performance, look below:

For a sneak peek of "Mash Off," look below: