The speech Crews was listening to in the beginning of the episode mentions finding serenity. Christina Hendricks plays in this episode as well as in the show Firefly, where the ship is named Serenity.
Stark is caught on a wire linked to a bomb so Tidwell steps up beside Stark to cut it. As he does he says that he "always had a desire to be standing beside Jessica Alba" when he dies. Jessica's brother Joshua has a minor role, unfortunately not in this scene.