“Last Man on Earth” (8:30 p.m., Fox) - Tandy devises an escape plan to get away from Pamela and back to Carol and the others. Meanwhile, the rest of the gang encounters a castaway, Glenn, who has been stranded on the island for years.
“Madam Secretary” (9 p.m., CBS, Season Premiere) - Season four beings with a diplomat suddenly dying during a meeting with Elizabeth on the first day of the U.N. General Assembly.
“The Robot Chicken Walking Dead Special” (10 p.m., Cartoon Network) - Andrew Lincoln, Norman Reedus, Melissa McBride, Jeffrey Dean Morgan and other cast members lent there voice to this spoof of “The Walking Dead.”
“Supergirl” (7 p.m., The CW, Season Premiere) - Kara deals with the loss of Mon-El by focusing all her energy on being Supergirl and on the mysterious new threat against National City as season three begins.
“Valor” (8 p.m., The CW, Series Premiere) - The premiere of this drama about the Shadow Raiders, an elite unit of U.S. Army helicopter pilots, beings with a top secret mission to Somalia going terribly awry.
“The Flash” (7 p.m., The CW, Season Premiere) - Season four beings with a powerful armored villain threatening to level Central City if the Flash doesn’t appear.
“DC’s Legends of Tomorrow” (9 p.m., The CW, Season Premiere) - The Legends are relieved of duty by the Time Bureau when they break the timeline as season three begins.
“Riverdale” (7 p.m., The CW, Season Premiere) - Archie struggles with the emotional aftermath of the shooting at Pop’s diner, as Fred’s life hangs in the balance. Meanwhile Veronica’s father arrives in Riverdale earlier than expected.
“The Story of Us with Morgan Freeman” (7 p.m., NatGeo, Series Premiere) - In the series premiere, Morgan Freeman travels the world in search of greater insight regarding the concept of freedom, and what freedom means to humankind in different parts of the planet.
“Mr. Robot” (8 p.m., USA, Season Premiere) - In the season three premiere, Elliot gets woke and realizes that his mission needs help from Angela.
“I Love You, America” (Hulu, Season Premiere) - Comedian Sarah Silverman looks to connect with people who may not agree with her personal opinions through honesty, humor, genuine interest in others, and not taking herself too seriously.
“Supernatural” (7 p.m., The CW, Season Premiere) - Season 13 begins with Sam and Dean picking up the pieces after the loss of their mother, the demise of Crowley and the heartbreaking death of Castiel.
“Arrow” (8 p.m., The CW, Season Premiere) - Oliver deals with the fallout of the explosion on the island as season six begins.
“Mindhunter” (Netflix, Season Premiere) - Two FBI agents (Jonathan Groff and Holt McCallany) set out on a sinister investigative odyssey to discover the brutal answers to the question, “How do we get ahead of crazy if we don’t know how crazy thinks?”
“Crazy Ex-Girlfriend” (7 p.m., The CW, Season Premiere) - Season three beings with Rebecca plotting revenge against Josh, after he abandoned her at the altar.
“Jane the Virgin” (8 p.m., The CW, Season Premiere) - Jane is reunited with her first love, Adam, and is shocked but happy to see him but Xo and Alba are less than thrilled he’s back as season four begins.
“Halt and Catch Fire” (7 p.m., AMC, Series Finale) - In the series finale, Donna celebrates a milestone with her closest allies; Cameron contemplates saying goodbye; and Joe confronts an uncertain future.
“Saturday Night Live” (9:30 p.m., NBC) - “The Big Sick” star Kumail Nanjiani hosts. Pink is the musical guest.
Gazette media columnist Terry Terrones is a member of the Television Critics Association and the Broadcast Television Journalists Association. You can follow him on Twitter at @terryterrones.