Update: Voting is now closed. See who won!

Previously: It's down to your public radio final four, and it's time to make your vote known. (Round 3 is now officially over.)

The previous round featured some tough matchups, including All Things Considered holding an early lead over Radiolab before Radiolab fans rallied for the victory. Who's going to be the Cinderella story this time?

Game show favorite Wait Wait... Don't Tell Me! faces the show which defined a new path for public radio, This American Life.

The talk show queen Terry Gross leads Fresh Air to a battle against a show which has recently become often imitated but never duplicated, the editing wizards at Radiolab.

Round 4 voting closes Thursday, April 4 at 5 p.m.

Stay tuned — the championship voting begins April 5 before coming to a close on Sunday, April 8. The results of the championship bout will be announced April 9.

Who will it be? Who do you have in the finals? Can we take this to Vegas? Vote below. (You can click here to view a larger version of the brackets in a new window.)