Alicia Lagano is set to cause some major problems on Castle Season 6.

The actress, best known for her role as Selena on The Client List, will stop by an episode of this ABC hit this fall.

According to TV Line, Lagano will portray a fugitive named Emma who takes some people hostage... and will only negotiate with a certain handsome actor for reasons not currently known.

Lagano will appear on Episode 4 of Castle Season 6.

Speaking of which: Did you catch the first teaser for this show's return? What do you think Beckett will and should say?!?

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.