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Cleopatra: A man without sons is a man without a future.
Trivia: Although they didn't have any scenes together, Kevin McKidd (Vorenus) and Tobias Menzies (Brutus) would discuss their characters and brainstorm about how to portray them, because they felt their characters went through very similar moral conflicts. Confirmed by Kevin McKidd on the season one DVD commentary.
Question: Who is the mother of Pompey's children? His new wife can't be their mother, since they are too old compared to Niobe's son who's an infant when the show starts. And they can't be Julia's children, since Pompey is worried Caesar might kill them, and Caesar wouldn't murder his own grandchildren.
Answer: According to wikipedia, Pompey's children are all from his third wife, Mucia Tertia. Julia is his fourth wife. See: http://en.wikipedia.org/wiki/Pompey#Marriages_and_offspring.
Myridon