By Katheryn Winnick has signed up to appear in Person of Interest.
The actress will guest star as a "resourceful" bounty hunter named Frankie Wells, reports TVLine.
She is scheduled to feature in episode 18, which will air in the spring.
Winnick is known for starring as Lagertha in historical drama Vikings, and had a recurring role in crime procedural Bones.
She has also made appearances in Nikita and CSI.
Person of Interest continues Tuesdays in the US on CBS. It airs on Channel 5 in the UK.
