Over the goodnights of this week’s episode of Saturday Night Live, it looked like a bunch of cast members dressed up as each other for Halloween. Tommy Brennan was outfitted in a clown-like Sarah Sherman outfit and her signature haircut; speaking of signature haircuts, Mikey Day was in a wig from Ashley Padilla’s famous “I like it” sketch, and mouthed that line to the camera; and Marcello Hernández appeared to be dressed as Jane Wickline. It was…