What to Watch Monday, April 27

'Chuck'
(8PM, NBC) 2nd season finale
First of all, like many must-see-TV fans, we're hoping this is just a season, not a series, finale, especially since the episode ends with what 'Chuck' creators have called a 'game-changing' event.

Lest you think Chuck can relax and enjoy Ellie and Awesome's wedding now that the pesky Intersect is out of his head, here comes baddie Ted Roark (Chevy Chase) vowing to get revenge on Chuck and his papa (Scott Bakula), and promising to use Ellie and her wedding to do it.

Meanwhile, Chuck's still got some unfinished business to attend to with Sarah, he and Casey share a dude moment and Ellie may not be the only one walking down the aisle ... here comes the Morgan?

'Heroes'
(9PM, NBC) 3rd season finale
Sylar and Nathan face off and Matt Parkman goes to extremes to protect his family, and it all leads to one major – and allegedly permanent – death amongst the heroes.

'Greek'
(8PM, ABC Family)
While the sororities are duking it out with a game of dodgeball, Rusty is duking it out with Dale, as he tries to get his roomie to occasionally leave their apartment.

'24'
(9PM, Fox)
Whhhyyyy, Tony? Why?

'Gossip Girl'
(8PM, The CW)
Georgina Sparks is back, but is she really as transformed as she's claiming to be? Meanwhile, Serena's latest boring romance – with the equally boring Gabriel – continues to be boring.

'The Big Bang Theory'
(8PM, CBS)
When his brahs head to Vegas, Sheldon gets locked out of the apartment and is forced to shack up with Penny.

'CSI: Miami'
(10PM, CBS)
One of two finalists in a 'Bachelor'-ish reality TV series is murdered just as the show's star was about to propose to her, and right after he had already dumped the other woman. Hmmm, it doesn't take Horatio Caine dramatically removing his sunglasses to figure out who the suspect is here.

'We Shall Remain: American Experience'
(Check local listings for time, PBS)
The third part of the miniseries unfolds the Trail of Tears, as 4,000 members of the Cherokee tribe died when they were forced to leave their land in Alabama, Mississippi, and Louisiana and march to a new home in Oklahoma.

Also on tonight:
- 'In Treatment' (9PM, HBO)
- 'The Hills' (10PM, MTV)


What's on tomorrow: 'NCIS,' My Boys' and more

Check out our TV calendar for a look at the month ahead