This was not intended as the series finale of Drake & Josh, but the final episodes did not air in order. "Really Big Shrimp" was the intended final episode.
Jeremy Rowley (a.k.a. Dancer Worker) later played the role of Lewbert in iCarly.
This episode aired as part of Nickelodeon's dancing lineup, featuring dancing themed episodes of Nickelodeon television sitcoms, including new episodes of Unfabulous ("The Auction"), Zoey 101 ("Dance Contest"), Just Jordan ("Dancing King"), and iCarly ("iDream of Dance").
This is the series finale.
Movies listed on the Premiere Theater marquee: "Kissed Her Sister," "Cookie and Mischief," "Lost with the Breeze," "Daddy Hot Pants," "Bacon and Legs," and "Hungry Girl." Posters inside the theater appear to match this line-up, except for a poster for "The Adventures of George Glass."