A mysterious stranger on the phone invites four strangers into the game.
If they accept, they're paired into two teams and dared to perform physical and mental challenges to win $50,000.
MTV says the tasks range from "hanging off the edge of Seattle's Space Needle to racing into a burning building to save a man's life."
Timberlake is the show's executive producer.
"The Phone" is expected to premiere April 21.
What the El!?! Editorial:
Sounds interesting, but another reality show? Really?
I'm sure JT will do well, he does well in everything he attempts!