The "Family Guy" episode airing on Fox, April 17, 2011 is titled "Brothers & Sisters" :
"...When 'Mayor West' (Adam West) marries 'Carol' (Julie Hagerty), the sister of 'Lois' they move into the 'Griffin' house to be one big 'happy' family.
Take a look at more footage from “Rebel Moon Part Two: The Scargiver” directed by Zack Snyder, now streaming on Netflix: