 Peter then interjects his hatred of PBS, after viewing a nine-part series on traffic signs by director and producer Ken Burns, the fourth of which on the yield sign.Later, after returning to dinner, Peter becomes an embarrassment to Lois, who recalls having dinner with Paul McCartney's ex-wife, Heather Mills, during which Peter began playing footsie with Mills, whose prosthetic leg ultimately falls off.In an attempt to make Barbara love Carter again, Peter instructs him that he must befriend a cute child in order to win her over.