Challenge: Tony's testing out some new armor, but he's late getting home -- which means Pepper has every reason to experiment with some of his armor's more interesting systems.

Son of Thunder: "A reunion, an offer, a promise. Star Trek XI/Thor crossover. Written for amine_eyes." Under The Suit (We Have To Work Together): "In which Charles and Erik's X-Men team up with the Avengers, but Erik's distracted by the guy in the metal suit."

Steve sang in the shower. Of course Steve sang in the shower; if Tony had been making a list of stereotypical, I-came-from-the-1940s, Boy Scout traits, singing in the shower would be at the top of the list.

On an exploration mission to Elissinar IV, Kirk talks Sulu into letting Dirandae, one of the President's aides, take them back to her room to "look at a plant". It turns out the Elissinar have entirely different sexual organs from Terrans. Hey, exploration missions can be fun!