The controversial Patriot Act's Section 215 expires this June, and John Oliver would like you to know it. The HBO comedian took a deep dive into government surveillance programs on his show this week, and he headed to Russia to meet with someone who could provide some context: Edward Snowden.

Without spoiling too much, in what's become his style, Oliver starts by explaining the intricacies of surveillance, interspersed with gags. But unlike his other famous explanatory monologues — net neutrality, say — the Oliver interview with Snowden takes a wholly serious turn, before turning into an extended, hilarious dialogue on the easiest way to make people understand why surveillance matters: penis photos.

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