The final episode of Series 4 airs at 7.30pm this Saturday on ITV1.

Watch will then precede Series 5 by repeating Series 4‘s episodes weekly from April. UKTV told us: “At the moment the plan is to have a break of one week between the two series”.

Series 4 and Series 5 of Primeval were shot as one block of 13 episodes, following a deal between ITV and UKTV with producers Impossible Pictures. BBC America and Germany’s Pro7 were also co-production partners for the episodes.

Series 5 is expected to air on ITV1 in early 2012.

Watch the Series 4 trailer…