“The Naked Brothers Band” (8 p.m., Nickelodeon): We know you were wondering when

“The Naked Brothers Band” (8 p.m., Nickelodeon): We know you were wondering when “The Naked Brothers Band” would be expanded into its own movie. Wonder no more. The “mockumentary” erupts into an all-out battle of the bands — and romantic rivalry — in a special that features loads of original songs. Nat and Alex Wolff star.