A new man is entering Annie Walker’s life: Simon Kassianides (the UK’s MI-5) will guest-star on the upcoming fourth season of "Covert Affairs", TVLine has learned exclusively.

The actor will appear in Episode 5 as Dion Stavros, a debonair, Vienna-based arms dealer whose inner circle Annie must infiltrate.

http://tvline.com/2013/05/10/pretty-little-liars-spin-off-cast-ravenswood-nicole-gale-anderson/