The second series of the British science fiction programme Primeval began on 12 January 2008 and concluded on 23 February 2008 after airing seven episodes.

Primeval follows a team of scientists tasked with investigating the appearance of temporal anomalies across the United Kingdom through which prehistoric and futuristic creatures enter the present.

The second series also introduced the Anomaly Research Centre (ARC), created using a massive set in a building formerly for military use at Longcross Film Studios in Chertsey.

Reception was overall positive; critics enjoyed that it did not take itself too seriously and found the second series to be both entertaining and overall an improvement over the first in terms of its central story arc.

[2] Given that the production team saw it as important to also introduce new characters to keep the series fresh and exciting,[5] they were joined by new additions Karl Theobald and Naomi Bentley.

[5] Karl Theobald's Oliver Leek was envisioned as James Lester's (Ben Miller) ambitious and sinister assistant.

[9] James Murray's Stephan Hart was written to be subtly alienated from the rest of the team following the revelation early in the second series that he has had an affair with Nick Cutter's (Douglas Henshall) wife Helen (Juliet Aubrey).

The building, originally used for military testing purposes, was seen by production designer Paul Cross, who thought it would be great to shoot in.

McCusker felt that although Juliet Aubrey, Lucy Brown and Ben Miller all "[did] their part", it was Douglas Henshall who carried the series and that he was perhaps "too good for this material".

[28][30] Another episode-by-episode reviewer was Rob Buckley of The Medium is not Enough, who thought that Primeval overall "wasn't bad" and "far less up its own arse than most of the new [Doctor] Who has been" and "more mature than new Who and Torchwood".

[34][35] Buckley criticised the CGI of the Smilodon in the third episode[36] and also complained that Caroline Steel, Primeval's first non-white main character, turned out to be a spy and an antagonist.