In keeping with the departure of 'Rob Morrow's' character (Dr. Joel Fleischman), the opening sequence was edited to remove the shots of the Northwestern Mining Co. building which has Dr. Joel Fleischman painted on the front window.
With this episode, 'Rob Morrow' (Joel Fleischman) is removed from the opening credits; Teri Polo (Michelle Capra) and Paul Provenza (Phil Capra) are added, having been previously listed as special guests.
Phil Capra stated that he and Michelle have 'gone down the rabbit hole' (a period of chaos or confusion) which is an allusion to 'Alice's Adventures in Wonderland' written by Lewis Carroll.