#263 What's the Kennection?

1) Challah, eaten on the Jewish Sabbath, is a special braided type of what food?
2) What's the standard unit of mass in the common U.S. measurement system—about 14.6 kg, though the name is also used for much lighter items, like bullets and counterfeit coins?
3) M. Night Shyamalan's upcoming movie Glass is a sequel to what 2016 James McAvoy movie, about multiple personality disorder?
4) What's the name of Plato's best known work, a dialogue about the philosopher-kings of a utopian society called Kallipolis?
5) What's the more familiar married name of Emma Knight, Diana Rigg's character on TV's The Avengers?
What's the "Kennection"?
Ken Jennings was on Jeopardy! 75 times in a row, so long that your grandma got sick of him. He is the author of nine books, most recently the Junior Genius Guides for children. He lives in Seattle.