Roots: The Lost World, Jurassic Park, The Land that Time Forgot,. There are references to Michaelangelo, Caravaggio, Leonardo da Vinci and the Mona Lisa, Jaws, Ponce de León, Treasure Island, Robinson Crusoe, Herotodus, Prester John, King Kong, Superman, Dr Livingstone, Rubik's Cubes, One Million Years B.C., the Bible, and Gutenberg.
Continuity: The Calibas are seven foot tall skeletal bipeds with three-fingered hands. The ones seen here wear leather and chain mail skirts. They are scavengers from within the vicinity of the Soronax Nebula, who "borrow" technology from other species: they are only capable of interstellar travel because they found the warp engine of a Utraxan mining asteroid that crashed on their homeworld. Their perception filter technology may have been scavenged from the Saturnyians.
The temporal energy leaking from the damaged time drive causes cellular regeneration, which inspired the legend of the Fountain of Youth.
The Doctor claims that he has been flying the TARDIS for about eight hundred years. His pockets contain a crumpled raffle ticket and a stub of pencil. He claims that his grandmother's cousin seventeen times removed is called Bob.
Amy wears a vintage bomber jacket, denim shorts and a sleeveless tan top here.
Rory expresses an interest in visiting Olympus Mons on Mars. He went to Disneyland, Florida, with his parents when he was six years old.
Links: Amy recalls meeting Vincent van Gogh (Vincent and the Doctor). The Doctor notes that Welsh mining villages can be lethal (The Green Death, The Hungry Earth/Cold Blood). Rory mentions Venice (Vampires of Venice) and says of pirates "Again?" (The Curse of the Black Spot). Amy refers to the Doctor flying the TARDIS with the brakes on (The Time of Angels/Flesh and Stone). The Doctor states that he doesn't want the TARDIS blowing up "again" (The Pandorica Opens/The Big Bang) and mentions the crack in Amy's wall (The Eleventh Hour).
The Cloister Bell, first heard in Logopolis, rings here. Amy makes sarcastic comments about Stetsons and fezzes (The Impossible Astronaut/Day of the Moon, The Pandorica Opens/The Big Bang). The Doctor notes that he once met a version of Blackbeard (The Mind Robber) and that Amy and Rory never used to believe in the power of dreams (Amy's Choice). Amy recalls facing down Daleks (Victory of the Daleks), Weeping Angels (The Time of Angels/Flesh and Stone) and Atraxi (The Eleventh Hour - she also mentions Prisoner Zero).
The Doctor notes that he was indirectly involved in the extinction of the dinosaurs (Earthshock) but that this didn't stop him from encountering them in London during the nineteen seventies (Invasion of the Dinosaurs) and in a cave beneath Wenley Moor (Doctor Who and the Silurians). The Doctor recalls being in Pompeii just before the volcano erupted (The Fires of Pompeii).
Location: The Florida Everglades, 1881.
The Bottom Line: Entertaining enough, and the lack of an actual villain is quite refreshing. However, temporally displaced dinosaurs are something of a sci-fi cliché and the Calibas aren't terribly interesting aliens.