On Doom, Merla is doling out shoulder massages to Zarkon (a little FIL kink, eh?) and it seems Haggar is jealous. She reminds Zarkon about when she was just as young and beautiful - though it was more than 1,000 years ago - as well as reminds him of all her evil deeds in those years. Zarkon is unimpressed given Voltron is still a thorn in his side.