Episode 4.2
Of course, it is completely impossible to tell whether Alan is looking at his former mentor, the saintly Captain Phillipa Georgiou of Star Fleet, or her evil twin from the mirror universe: her most Imperial Majesty, Mother of the Fatherland, Overlord of Vulcan, Dominus of Qo’noS, Regina Andor, Emperor of the Terran Empire, Philippa Georgiou Augustus Iaponius Centarius. That said, there’s something about the cut of her jib – is her uniform a little different? – that makes Alan begin to suspect the latter.