“Dinosaurs on a Spaceship” lets us know up front that this is going to be a “romp”—big, loud, and hopefully fun.
It makes clear the true nature of the relationship between the Doctor and the woman who has variously infuriated, intrigued, and attracted him for the last several years.
“Cold Blood” completes the two-part story of the clash between the Silurians and present-day humanity, showing the two sides being unable to overcome their seemingly irreconcilable differences.