I'll avoid spoilers. But CBS has already widely advertised that the dome becomes magnetized in tonight's episode. And, yes, all sorts of metal things fly toward it and stick. Guns. Nails. Barbecue grills. Large vehicles. So you don't want to be between those things and the dome.
However ... if you look closely at the scene when several of the characters are on a road dodging flying cars and trucks, it looks very much like they're standing next to a barbed wire fence. And the metal barbed wire isn't reacting to the giant magnet at all.
That's not the reason I'm giving up on "Under the Dome." It's trivial compared to the increasingly annoying narrative, which is definitely not worth wasting any more time on.
Elsewhere on TV ...
World Cup soccer: France vs. Nigeria (10 a.m., ESPN); Algeria vs. Germany (2 p.m., ESPN)
The Bachelorette (7 p.m., ABC/Ch. 4): A group dates takes the guys and Andi to castle ruins in Belgium ... because that's the way to find true love.
Harry Potter: The Making of Diagon Alley (7 p.m., NBC/Ch. 5): Yes, it's an hourlong infomercial for the new attraction at Univeral's Orlando theme park ... but I'm interested.
MasterChef (7 p.m., Fox/Ch. 13): The contestants have to prepare dishes using canned food.
Major Crimes (7 and 9 p.m., TNT): An accused rapist is murdered.
American Ninja Warrior (8 p.m., NBC/Ch. 5): Qualifying concludes in Denver.
24: Live Another Day (8 p.m., Fox/Ch. 13): Audrey confronts Mark; the terror threat widens.
Beauty and the Beast (8 p.m., CW/Ch. 30): Gabe takes Cat on a romantic date.