Susanna Lazarus of Radio Times suggests that the episode is memorable specifically for its crocodile footage. The techniques used to produce the footage have caused the episode to be described as "controversial" by some sources. Mark Pickavance of the website Den of Geek criticises the footage from a visual standpoint, arguing that the use of scale sets with young crocodiles, "shot in super close-up to make them seem huge", does not produce a convincing illusion of giant alligators. Author Dave Thompson compares the giant reptiles to Swamp Thing, a superorganism featured in the DC Comics Universe.
