Fringe will not air a new episode until March 23, but the mysterious Fox drama is giving fans plenty to ponder until then.

As first reported by TV Line, Australian actress Georgina Haig has been cast on the series in a potentially recurring role. She'll debut on episode 19 of season four as Etta, the partner of a new agent portrayed by Henry Ian Cusick.

What will the pair be up to? Will they be employe Over Here or Over There? Will there be a season five on which one or the other - Cusick is attached to ABC's Scandal -  can return? All question for fans to debate over the next few weeks.