NGTV Guide: Thursday, December 15

Person of Interest – CBS 9/8c
“Number Crunch” – As Detective Carter deals with the fallout from her recent encounter with Reese and Finch, The Machine ups the ante for the duo by giving them four Social Security numbers instead of one.

Prime Suspect – NBC 10/9c
“A Gorgeous Mosaic” – When a Jewish diamond dealer is found dead, Jane looks for answers from his wife. Blando and Jane investigate some rappers in Brooklyn after getting a strong lead. Meanwhile, Matt gets a huge job and surprises Jane with a celebration.

The Mentalist – CBS 10/9c
“Fugue in Red” – Patrick Jane almost drowns while investigating the murder of a fireman and loses his memory, turning him into the old con man Patrick Jane.