In this one, I would be part of a secret agency that watches over time, making sure that it flows as it should. I would be a rising star, due for a promotion. A jealous colleague or two would remove my tracker, and send me back to sometime in the Roman Empire, where I would be found by passing slave traders and sold. Not speaking latin, or any of the languages of the time, I wouldnt be able to tell anyone the truth, and the agency would have no idea where or when I was.
If this appeals to anyone, let me know. My partner in this would play a wealthy roman citizen who sees me and buys me, military or a wealthy civilian.