Who Do You Think You Are (8pm, NBC) - Marisa Tomei (left) explores her roots and focuses on a possible family murder. Her quest takes her to Italy to uncover the truth about the alleged slaying of her great-grandfather.
Shark Tank (8pm, ABC) - A new guest shark tonight: QVC personality and inventor Lori Greiner, who holds over 110 patents. Before the panel tonight: a towel designed for modesty while changing out of a bathing suit, a cake mix for dogs, and an update on a class-notes sharing site for college students.
Nikita (8pm, CW) - Nikita tries to save her mentor from being killed by Percy in his attempt to take control of Division. Meanwhile, Amanda tells Alex it is time for her to take back Zetrov.
Grimm (9pm, NBC) - A trail of homicides puts Nick and Hank in pursuit of a deadly heartbreaker.
Blue Bloods (10pm, CBS) - A wealthy woman dies of an apparent heart attack, but her eccentric daughter claims she received a message from God that the death was actually a murder.
Confessions: Animal Hoarding (10pm, Animal Planet) - Featured tonight, a North Carolina woman with 30+ cats and a recidivist hoarder (not from North Carolina!) who secretly keeps dogs in a junkyard. Read more about the North Carolina case, in which the Wake County SPCA assisted in the removal and placement of the animals involved. Cats Winslow and Winny from this show still need a home!
Michael Feinstein's American Songbook: Lost and Found (10pm, UNC-TV) - Feinstein sets out to authenticate a previously unknown song by one of the giants of American popular music. He also convinces Broadway composer Jerry Herman to share one of his previously unknown tunes. Tony Award-winner Christine Ebersole also appears.