The Party of Five and V alum played the dangerous Casey Stratton in two episodes.
Tomlin took on the role of the McGee's grandmother on the CBS hit series.
The Friday Night Lights star had a recurring role as arson investigator Det. Jason King in season nine.
Ducky was quite the lucky duck when he landed this gorgeous Charlie's Angels alum as his love interest.
Reeves, who played Ari's long-suffering wife on Entourage, tackled the role of Tony's ex-fiancee.
The Law & Order: SVU actress fights crime here too. Her NCIS character Special Agent Abigail Borin pops up on a recurring basis.
Star Mark Harmon's Freaky Friday costar played his onscreen love interest once again as Dr. Ryan.
Wagner has appeared severl times on the show as DiNozzo's father.
The Waltons actor has appeared several times to play Gibbs' father.
The former pageant queen played the the girlfriend of one of the team's victims in a season-seven episode.
The celebrated actress played Joann Fielding, Gibbs' upscale mother-in-law.
The soap stud guest-starred in a 2008 episode.
The Sex and the City alum (Steve!) played a former NSA Analyst. Miranda would be so proud!
Celebrity DNA: Check out these CSI guest stars!