Having experienced her initial journey alongside the Doctor in the TARDIS, "Sarah Jane" (Elisabeth Sladen) finds herself more centrally involved as she and the "Doctor" (Jon Pertwee) encounter a London that has been emptied due to dinosaur attacks. Following a disagreement with military personnel regarding a fur coat, they reconnect with "UNIT" and assist the "Brigadier" (Nicholas Courtney) in uncovering the truth. A…