This is a special bonus comic that doesn’t play by the normal comics’ rules, man, because a Pope retiring and North Korea firing off a nuclear device at once doesn’t happen every Tuesday.

The sixth Star Trek movie was called The Undiscovered Country, being about détente between the Federation (America) and the Klingons (Soviets) after a (nuclear) disaster at the Klingons’ moon Praxis (Chernobyl). Since it is both a relevant reference and a bad pun, we felt it to be succinct.

Further context can be found here and here.