V, NCIS: Los Angeles, and Sons of Anarchy

8 a.m., PBS

Sesame Street

First Lady Michelle Obama helps the Street-dwellers celebrate their 40th year on the air!

8 p.m., ABC

A seeker from the Visitors is keeping a (reptilian) eye on Erica (Elizabeth Mitchell) and Father Jack (Joel Gretsch).

9 p.m., CBS

The latest case provides some insight into the attack on G. Callen (Chris O'Donnell) that we saw in the season premiere.

9 p.m., CW

The police search Auggie's (Colin Egglesfield) apartment for clues about Sydney's (Laura Leighton) death.

10 p.m., FX

In this special 90-minute episode, Gemma (Katey Segal) has to put Jax (Charlie Hunnam) and Clay's (Ron Perlman) stalemate to an end.

11 p.m., COMEDY

Tennis star Serena Williams stops by. Perhaps to discuss her little U.S. Open outburst?

Also on the airwaves ...
NCIS, 8 p.m., CBS
So You Think You Can Dance, 8 p.m., FOX
The Biggest Loser, 8 p.m., NBC
90210, 8 p.m., CW
Dancing with the Stars, 9 p.m., ABC
The Good Wife, 10 p.m., CBS
The Hills, 10 p.m., MTV
The City, 10:30 p.m.,

What are you watching tonight?