Doctor Who CDs: Sontarans Vs Rutans 1 - Battle of Giants Causeway CD

Description:
The war between the Sontarans and the Rutans has been going on for millennia. And is likely to continue for millennia more. A terrible conflict with no care for consequences or collateral damage. Billions have died with no end in sight.
A temporal tidal wave leads the Doctor, Charley and C'rizz to the Giant's Causeway, Ireland 55BC, where the TARDIS drains of power and they encounter Sontarans who believe they're Roman Legionnaires.
What has caused this and what is the strange secret in the rocks?

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