Tiberius embarks on a series of acts of debauchery, having sex with anybody he pleases, with Caligula a willing participant. Livia is shocked and Tiberius arranges to give her a horoscope for her birthday to suggest to her that she has not long to live. Augustus's son Castor is perturbed at the free hand given Sejanus in bringing to trial anybody Tiberius feels is opposing him but Castor's wife, Livilla, disagrees and is having an affair with Sejanus, ultimately poisoning Castor to get him out of the way.I, Claudius Queen of Heaven Ep7 | July 21, 2016 | Great British TV Classics BBC ITV C4
(again, not a documentary, but wonderfully entertaining; also, I set the time index at 7:33 to skip that overlong ridiculous crap pile intro to this episode, which looks like something cooked up to indulge someone's career)