Jeopardy! Begins Its Post-Alex Trebek Era With a Familiar Face

How do you replace an icon like Alex Trebek? The producers of Jeopardy! have wisely chosen not to — at least, for now. Instead, a series of guest hosts will fill in for the legendary game show host, starting tonight with the show's most famous champion (and recently-crowned GOAT) Ken Jennings. 

Also today: Matt James just keeps on making history on The Bachelor, The American Experience tells the story of a brilliant codebreaker, and Netflix examines the 1080s rise of the crack epidemic. Here's what's new and noteworthy on TV this Monday:

NEW EPISODE: Ken Jennings has enjoyed a close association with Jeopardy! ever since his record-breaking 75-game winning streak back in 2004. Tonight he takes his first turn behind Alex Trebek's legendary lectern as the show's first-ever interim guest host. Watch preview.  Airs in syndication (check local listings)

NEW EPISODE: The largest group date in the history of The Bachelor finds 18 women dressing up for a wedding shoot, while Matt suits up as the would-be groom. Later, Sarah joins Mr. James for a romantic biplane ride. 8:00 PM ET on ABC

DOCUMENTARY: The American Experience tells the fascinating story of Elizebeth Smith Friedman, The Codebreaker whose work as a cryptanalyst helped the U.S. government decode thousands of messages, including ones that ultimately sent Al Capone to prison and brought down an under-the-radar Nazi spy ring during World War II. Watch trailer. 9:00 PM ET on PBS

NCAA FOOTBALL: Alabama takes on Ohio State in the College Football Playoff National Championship from Hard Rock Stadium in Miami Gardens, Florida. 8:00 PM ET / 5:00 PM ET on ESPN

DOCUSERIES PREMIERE: Inspired by The CW drama All American, the new docuseries All American Stories tells the real life stories of athletes who defied the odds to achieve their goals. Former NFL and Oregon football star Spencer Paysinger and Yogi Roth act as co-hosts. 8:00 PM ET on The CW

DOCUMENTARY PREMIERE: Stanley Nelson (Miles Davis: Birth of the Cool) directs Crack: Cocaine, Corruption & Conspiracy, examining the rapid rise of the cheap and powerful drug, and the Reagan administration's misguided response. Watch trailer. Streaming on Netflix

NEW EPISODE: Elena (Megan Montaner) and Paco (Miguel Ángel Silvestre) discover that a local mirror is haunted on 30 Coins. When Father Vergara (Eduard Fernández) spends the night investigating the mirror's trickery, he risks getting swept into its deathly portal. 9:00 PM ET on HBO

Mike Attebery is Senior Editor at Primetimer and the author of seven mystery thrillers. Follow him on Twitter at @mikeattebery.