|Scientific name||Diictodon feliceps|
|Home time period||Late Permian period|
|Appearances|| Episode 3.3|
Diictodon is a small, herbivorous animal, roughly forty-five centimetres (eighteen inches) long, and was one of the most successful synapsids in the Permian. Diictodon are also shown to chew up nearly anything they can, from cables, cage mesh and electrical wiring to paper and clothes.Anomaly to a hospital in present day London and scattered throughout the building; chewing through the hospital's electrical wiring and being sighted throughout the building by numerous people.
One Diictodon at one point stole a hospital patient's blanket and then returned through the Anomaly; and at another point, a Diictodon fell out of a ceiling and was captured by Connor Temple and Hilary Becker. When Abby Maitland captured a Diictodon, its distress call lured the other Diictodon back to the Anomaly. Most of the Diictodon returned through the Anomaly, but the Anomaly closed before the last one could go back through.Connor and Abby subsequently decided to keep the last Diictodon and the Diictodon Connor and Becker captured, with the two creatures now marooned in the present, and named them Sid and Nancy.
Sid and Nancy moved with Connor into the latter's room at the Anomaly Research Centre when Connor was temporarily living there. Sid chewed out of his and Nancy's cage and escaped into the ARC. Sid damaged the Anomaly Detection Device by chewing through its cables, and kept escaping whenever Connor came close to capturing him. By the end of the day, Connor managed to recapture Sid and repaired his and Nancy's cage.James Lester's flat, he took Sid and Nancy with him. One of the two Diictodon were transported there in the boot of Lester's car, and tore up some of Lester's classified files in there.
After Sid and Nancy moved into Lester's flat with Connor, the two Diictodon became a regular source of grief for Lester. On one night, one of the two partially ate both Lester's coat and his invitation to a dinner.
Abby brought Rex to Lester's flat as company for Sid and Nancy and vice versa. The two Diictodon met Rex for the first time and were immediately curious of him.
After Connor and Abby disappeared on a mission into the Future, when the ARC was revived, Sid and Nancy were kept in the new building's Menagerie with the other creatures that the ARC had failed to return to their times.
- They were one of the few creatures to be named.
- Although Sid and Nancy haven't been seen since Episode 3.9, it was confirmed by the producers that they are in the Menagerie after Connor and Abby disappeared.
- The Diictodons in Primeval resemble the Diictodons from Walking with Monsters.
|Series 3 Main Creatures|