Vincent Kartheiser & Nicholas Turturro Guest Star on 'Law & Order: SVU' (PHOTOS)

Meredith Jacobs

Law & Order: SVU is making it personal for one detective in the fall finale.

Nicholas Turturro returns as Detective Frank Bucci (introduced in Season 20's "Part 33"). In "Can't Be Held Accountable," he turns to SVU when he suspects his two daughters are being groomed by a serial predator, played by Vincent Kartheiser. But how far will he go to get justice?

6 Shortest Running 'Law & Order: SVU' Series Regulars (PHOTOS)

6 Shortest Running 'Law & Order: SVU' Series Regulars (PHOTOS)

With a new full-time addition to the 'SVU' team, we are pouring one (or six) out for the series regulars that didn’t stick around long.

"What he's done to my daughters, he's not getting away with it," he says in the preview (below).

Click through the gallery above for a look at Turturro and Kartheiser's guest spots.

Law & Order: SVU, Thursdays, 10/9c, NBC