Alyson Hannigan hosts season 7 of Penn & Teller: Fool Us, as magician Nathaniel Segal performs a math magic trick. Watch Penn & Teller: Fool Us Friday at 8pm ET on The CW and stream FREE on The CW app #pennandteller #magic #magician #cardtrick #illusions #number #magictricks #thecw #magictricksvideos #magicians #math #cardtricks #newmagic #newmagictrick #mathematics #new #live #performance #magictrick #numbers The CW Network features shows like Penn & Teller: Fool Us, Scrabble, Trivial Pursuit, Whose Line is it Anyway?, and WWE NXT! Don’t miss your favorite CW shows! Stream full episodes FREE on The CW App cwtv.com go.cwtv.com/APPSyt