Tarn smiles at Sonia, clearly uncaring of her shallow threat. He can handle Natasha and anything that she may bring.

"I was told the same story in a desperate attempt to take the Princess' place in captivity. Perhaps there's some truth worth following up on..."

Time traveling certainly isn't out of the realm of possibility. Especially considering Tarn's current species change-- Is a bit of trip through time and space really so odd?