Dark Blue

Dark Blue
9/8c TNT
Executive producer Jerry Bruckheimer's police series about the shadowy derring-do of a deep undercover unit begins its second season with back-to-back episodes. In the first episode, leader Carter Shaw and his team join up with an attractive female FBI agent (Tricia Helfer, joining the cast) to bust a regional crime boss, but the case takes an awful twist when Carter's close friend is the victim of tragedy. In the second outing, the team tries to crush a drug ring, with Ty entering the big-bucks arena of a dealer, while a pretty art-gallery owner (Jordana Brewster) becomes a suspect. — Dean Maurer

America's Got Talent
9/8c NBC
In this summer show's weeding-out process, thorns have gradually been cut from the roses, so it's only fitting that rocker and reality TV star Bret Michaels will be on hand to perform his signature hit, "Every Rose Has Its Thorn." Yes, lesser acts have been trimmed from the contest and standout acts have lasted to bloom brightly. Last night, in the fourth week of performance shows, 12 contestants from the Top 48 tried to flower on stage, hoping to impress judges and viewers alike. In tonight's results installment, four of those acts will win a slot in the Top 24. British R&B singer-songwriter Taio Cruz also performs. — Dean Maurer

The Choir: Boys Don't Sing
10/9c BBC America
"Gleeks" longing for the return of Will, Rachel and Finn to the Fox show may want to check out this docu-reality series, which chronicles choirmaster Gareth Malone's attempts to transform a ragtag group of students into a competitive choir. In Season 2 opener, Malone heads to a new school, an all-boys facility in Leicester, England, where sports rule and singing is considered less-than-cool. He's determined to change minds, but faces resistance early on from the students...and from some of the faculty. — Karen Andzejewicz

Psych
10/9c USA
Jean Smart and John Michael Higgins guest-star in tonight's intrigue-filled episode, in which Shawn and Gus investigate a young man's very public murder. The man was dating a rich widow and may have been plotting a major scam. But Shawn and Gus soon become convinced that someone else — a true scoundrel — was training the victim to be a con man. — Brie Hearn

Criss Angel: Mindfreak
10/9c A&E
Some save the best for last, but Criss Angel decides to go with the spectacular to begin his show's sixth season. So Angel attempts to jump the Grand Canyon in the opener, and to help him achieve the feat is a hybrid vehicle that's a cross between a motorcycle and car. With any luck, when all is said and done, he will somehow wind up, alive and well, in a locked jail cell, hanging from a helicopter. We'll see. — Bill Ecklund

Castle

10:01/9:01c ABC
A serial killer is on the loose in New York City, and Beckett and Castle (Nathan Fillion) are so desperate to track him down that when he continues to avoid capture they turn to the Feds for help. What they get in Part 1 of this two-part repeat from March is a new partner, agent Jordan Shaw (Dana Delany), whose investigative skills are legendary. What viewers get is another chance to see Fillion and Delany, who played a married couple on Desperate Housewives, work together again. — Rhoda Charles