Gadget, Penny and Brain travel back in time to prevent the destruction of their family's history by MAD time travelers. While in the past, they encounter caveman versions of themselves.
McCall goes undercover to investigate a string of female porn star murders.
A weekend spent clearing up lousy precinct paperwork leads Chris and Mary Beth to race to serve a warrant before the statute of limitations expires. Meanwhile Det. Petrie finds his weekend used up painting his apartment.moreless