The sci-fi drama's most recent run will premiere on June 16, producers Impossible Pictures have confirmed.
The show was renewed for two more series by ITV and digital channel Watch in 2009.
Under the joint agreement, ITV had first broadcast rights on Primeval's fourth series, with Watch then being able to air the episodes at a later date.
Watch would then air the fifth series first - which it did between May and June 2011 - with ITV having second run rights.
The six latest episodes - starring Andrew-Lee Potts, Hannah Spearritt and Ciarán McMenamin - will now air on ITV1 over a year after their first digital broadcast.
The future of the original Primeval is currently unclear with no further episodes being commissioned since the 2009 revival. However, in May 2011, Potts (Connor) told Digital Spy that he and co-star Spearritt (Abby) were unsure of their future with the programme.
"Primeval deserves to carry on, and I hope it does," he said. "As for mine and Hannah's involvement in that, we're not entirely sure."
A new Primeval spinoff - subtitled New World - was officially announced in February 2012. The "older, darker and scarier" series has filmed in Vancouver and will be broadcast on Watch in late 2012.
It is currently unclear if ITV will transmit Primeval: New World.
> Primeval: New World casts Vampire Diaries star Sara Canning
Watch a clip from the fifth series of Primeval below: