Another strong episode, but aren't they all? The "necklacing" was just.... brutal. But that stuff happened, and is still happening. Growing up in an oppressive system can create an entirely different value system; something that is hard to acknowledge in the "civilized" world. The Afrikaners were pretty hard-core, as we saw with the agent who was willing to die in such a horrible manner, and so became the people they oppressed.*
Philip & Elizabeth continue to hang onto their humanity by their fingernails, though. Their willingness to spare the young student may, however, come back to haunt them later. In this show, seemingly no act, benign or brutal, seems to occur without consequences.
Poor Martha. Can't see a scenario at this point where this ends well for her. Terrific job by that actress (Alison Wright) conveying all those complex emotions. What will happen to Philip's soul if he has to plug that leak (no pun intended)?
*For those who enjoy such things, there's an interesting little alternative history/sci-fi novel by Harry Turtledove called The Guns of the South
I read years ago. The plotline is what would happen if some of these hard-core Afrikaners were able to travel back in time to give Robert Lee's confederate army modern AK-47 rifles during the latter days of the Civil War. The point being, if the South had won the war and established a separate nation, it could have provided apartheid-ruled South Africa with a powerful natural ally in the coming century and possibly ensured its survival.