Is Gintama episode 137 filler?

#137

99% Of Men Aren't Confident In Confessing Their Love People Who Don't Believe In Santa Are The Very Ones Who Want To Believe, You Contentious Bastard

告白に自信のある男なんて99%いない ンタを信じていない人々は、あなた訟バスタードは、信じたい良いものです

Aired 18 Dec 2008