"Glee" (8 p.m., Fox):
The music-minded comedy returns from a long hiatus and lands on a new night. Tensions are high in New York, where Santana becomes Rachel's "Funny Girl" understudy. Meanwhile, in Ohio, Tina and Artie vie for the title of class valedictorian.
"Frontline" (9 p.m., PBS):
The latest edition delves into "The Secrets of the Vatican." It examines the reasons Pope Benedict XVI stepped down and the work of Pope Francis to set the Catholic Church on a new path.
"Mind Games" (10 p.m., ABC): This new drama series has Christian Slater and Steve Zahn starring as brothers who run a unique agency that attempts to solve their clients' problems with psychological manipulation. Our brains get melty just thinking about it.
Also on Tuesday: