As part of my occasional scattershot TV reviews, I thought I’d discuss the third episode of “How I Met Your Mother’s” sixth season. This year will be less sitcommy, the producers promised! This year will be different! We know we’ve hurt you, but we’ve changed. After a middling premiere and a solid second episode (sold largely because Neil Patrick Harris took center stage), the third episode was a decided disappointment. I get that they were trying to do something Big Picture, and tell us something about unfinished business and longing and closure, but they fell short. Some bits were funny (lawyer funk band!), some things grated so much they made me want to eat my remote (if I ever hear “Where’s the poop?” again, seriously, I am eating the first remote I find). A pretty weak outing.