Traditionally, the cast is given clues to guess the identity of the episode's guests, and once the guests appear and are introduced, they and the cast are given a set of puzzles to solve.
2/26/2015
3/3/2018
12/5/2022
8/29/2018
6/20/2022
9/29/1962
1/21/2015
12/29/2023
12/28/2009
12/2/2022
6/1/1974
1/6/1985
12/21/2018
3/22/2021
1/8/1978
5/12/2003
10/3/1998
12/2/2011
2/25/2019
6/20/1948
5/10/1991