RUB A DUB DUB...
Neither of these steamy bath scenes appear in Graves' novel or in any of the ancient sources. Some of the topics of conversation are derived from disparate sections of the novel. From the gals' bath scene, Julia's sexual frustration can be found on p. 72 and p. 77-8, Antonia's strict virtue is mentioned on p.54, Tiberius' feelings for his ex-wife on p.41 & 72, his predilection for boyish figures on p.72 and his "strange ways" on p. 75. Livia's role in arranging the Julia-Tiberius match also comes from Graves' p.40-1. In this scene, Julia tells Antonia that Livia encouraged her emotions, leaving out the bit from the novel that has her begging her father and threatening suicide if he does not arrange this marriage (p.41 and 77). And nowhere in the novel does Julia suspect Livia in the demise of her two husbands.

For the boys, see p. 41 on Tiberius' morosity. The sweet and the sour Claudian stuff is straight out of Graves p.15 and p.41-42. The snide comment about Livia and the snake is pure Pulman. Tiberius' pathetic cry for help echoes the support list on p.41. In Graves, those responsible for keeping Tiberius from the dark side are Drusus, Augustus and Vipsania. In the episode Tiberius' father is substituted for Augustus- emphasizing the theme that Augustus never really liked Tiberius.