- Besides the didus, the zoo also exhibits a mammoth, a stegosaurus, and a tyrannosaurus rex (or, at least, creatures that resembled these species). The zookeeper also acquires a pterodactyl at the adventure's close.
- The zookeeper walks around with a bush baby on his shoulder.
to be added
- The Doctor refers to the extinction of the dodo in 1681. (PROSE: The Last Dodo)
- The Seventh Doctor kept a dodo in the TARDIS zoo. (PROSE: Echo)
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