What to Watch Tuesday: Opening Act Goes Gaga, Annie's Affair Is Tested, DNC Kick-Off and More

On TV this Tuesday: It’s tough to keep a poker face when you learn you’re Lady Gaga’s Opening Act, Simon’s Covert Affairs are the subject of much discussion, a Happy Endings encore raises more than a glass, the Democratic party gets started and it’s just about time for the check on Hell’s Kitchen and MasterChef. Here are 10 programs to keep on your radar tonight.

8 pm Opening Act (E!) | Season finale: Von Smith is on the edge of glory when he finds out he’s been chosen to open for Lady Gaga.

8 pm Hell’s Kitchen (Fox) | In the first part of the season ender, the two finalists build their last dinner service menu and have it judged by world-renowned chefs. (The finale’s conclusion airs next Monday.)

RELATED | Fall Preview Headquarters — Video, Photos, Schedules & More!

9 pm White Collar (USA Network) | Sexy thief Alex Hunter (guest star Gloria Votsis) returns as Peter and the team investigate heists of rare artifacts. (Check out photos!)

9 pm Happy Endings (ABC) | In this Repeat to Revisit, almost everyone’s having erotic dreams about Dave, thank to Steak Me Home Tonight’s new signature drink.

9 pm MasterChef (Fox) | Chicken, lamb or… frog? That’s the mystery-box challenge in Part 1 of the cooking competition’s season finale. Choose wisely, contestants: Only the best dishes will help you continue to Part 2 of the final episode, which airs next Tuesday.

RELATED | Fall TV: Your Guide to 110 September Premieres and Finales!

10 pm Democratic National Convention (All Majors) | The broadcast nets’ primetime coverage of the DNC kicks off with a keynote address from San Antonio mayor Julian Castro and a speech from First Lady Michelle Obama.

10 pm Covert Affairs (USA) | When it becomes clear that Jai was investigating Simon, Arthur wants him brought in. So Annie – hoping to protect the sexy spy — requests the assignment.

10 pm Chopped (Food Network) | The final basket includes frozen pancakes. Let me just say that if using frozen flapjacks in your meal means you’re gourmet chef material, there have been many late night snack attacks where I was damn near Julia Child.

10 pm Hard Knocks: The Miami Dolphins (HBO) | Season finale: As the pre-season comes to a close, the Dolphins travel to Dallas to play the Cowboys while the coaches prepare to make final roster cuts.

10 pm All the Right Moves (Oxygen) | Thanks to injuries and scheduling conflicts, Travis and Kyle must premiere Shaping Sound on their own at a dance convention. Trav, if you’re in doubt, just dust off this classic.

Which of the above is must-see for you? Also, hit Comments to offer your own tune-in suggestions.