Circumstances of her life have driven Alice Obiefune into deep depression. The Doctor enlists her help in chasing a runaway alien "dog" (actually a Kharitite empathy beast). She has fun doing it, which eases her depression, but doesn't end it. She decides to join the Doctor on his adventure.; Doctor Who explains the advantages of the Bank of Silence. Since you immediately forget your deposit, you never spend any of it.; River is going out with Doctor Who. Mr. Pond worries about the danger, but the Doctor points out that it's only turbulence, a giant space dinosaur, and fire in the Tardis.