Prepare yourselves for many new faces in the near future, CSI fans.

With Annabeth Gish and Matt Lauria already tapped for recurring roles this fall, TV Line confirms that Grant Show will soon come on board as a love interest for Catherine, while a TV Fanatic favorite has been chosen to portray a nemesis for Ted Danson's D.B. Russell.

Titus Welliver (Lost, The Good Wife, Sons of Anarchy) will debut on November 23 as a military contractor whose role within his company, as it relates to a recent arms theft, gets called into question. The character will be named John, will stick around for a few episodes and will tie into Catherine's eventual departure.

Gish will be playing John's wife.