is primeval all done?

the last two, very short, series (seasons) of primeval were okay--better than dr. who or torchwood for the love of pete--but also seemed kinda perfunctory, especially the second set as they wanted to close out the story after ditching most of the characters, adding an unintelligible paddy and the doctor from deep space 9.  i know there's talk of a spinoff or a crossover in canada or something, and the ending could have been a finale wrap-up or merely the launching point for another long story arc.  i wouldn't mind seeing it continue in some form; they did a good job with having a long, consistent narrative despite having main characters leave the show on short notice multiple times.  i'm pretty sure the guy who plays the kid scientist, the girl and the paddy would love to do more...since it's time travel, they should bring back the original people, too.  why the fuck not?  it would be great to have the unintelligible weegie jock back to go with the fucking mick and the limey soap opera actors.