My Name Is Earl, The Office
7 p.m. and 8 p.m., NBC
It’s the season finales of “My Name Is Earl” and “The Office” - so why aren’t people more excited? Is it because the shows never regained momentum post the strike-induced hiatus? Is it because the shows aren’t as good as they once were? “The Office” is still funny, and has had some genuinely great episodes this year (Michael and Dwight hanging with apparent cokehead Ryan, totally awesome), but seems to have lost a lot of the zip and buzz (zip and buzz! morning zoo crew!) it once had. “Earl,” meanwhile, seemingly found new relevance at the beginning of the season with the main character in jail, but has slid into “nearly unwatchable” territory these last few weeks. Hopefully these episodes fare better - “Office” promises tons of surprises! And who doesn’t love surprises, right? The episode is called “Goodbye, Toby,” though, so if one of them involves Toby going somewhere I wouldn’t consider that very surprising.

Smallville
7 p.m., The CW
Most likely, this (the seventh season finale) is Michael Rosenbaum’s last episode of “Smallville,” since he’s left the show. In a way, it seems kind of odd, since he is just now becoming “totally evil” instead of “morally ambiguous,” but it actually makes sense given that the whole show is about the relationship between Clark (Tom Welling) and Lex, and the latter’s slow turn from “generally nice dude” to “evil supervillain.” So now that he’s at that point, it seems that the character arc is pretty much done, or else you don’t have “Smallville” - you have a Superman show. So what doesn’t make sense, perhaps, is that the show is continuing on for another season, but at least you creepy Chloe fans can be happy that Allison Mack will be back (a rhyme).

Lost
8 p.m., ABC
The dude that plays Keamy (Kevin Durand) is such perfect casting. He just seems like such a d-bag, that I’m really rooting for Sayid to kill him in some bizarre fashion. His Wikipedia article was obviously edited by his publicist, though. Anyway, this is the first part of the allegedly three-part “Lost” season finale, and parts two and three will air on May 29. Yes, that means no “Lost” on May 22. It’s going to be tough. Real tough. Especially considering this one will probably end with some kind of awesome cliffhanger. The previews have been showing the Oceanic 6 leaving the island, which still seems like a huge spoiler even if we’ve known about it for months.

ER
9 p.m., NBC
Technically, since next season is its last and that will be the “series finale,” this is the last “ER” season finale - ever! And we’ve had 13 ones before this! That makes this sort of historically significant, right? Plus, Steve Buscemi is guest starring, so you know it’s important (or an Adam Sandler movie). Also, Luka (Goran Visnjic) is apparently back, for tonight at least. Yay!

ALSO ON: Season finales all up in here - CBS procedurals “CSI” (8 p.m., CBS) and “Without a Trace” (9 p.m., CBS); The CW’s…supernatural drama, “Supernatural” (8 p.m., The CW); Fox reality shows for dumb people, “Are You Smarter than a 5th Grader?” (7 p.m., Fox) and “Don’t Forget the Lyrics” (8 p.m., Fox); and the Comedy Central cartoon for even dumber people, “Lil’ Bush” (10:30 p.m., Comedy Central). Also, new episodes on ABC - “Ugly Betty” (7 p.m., ABC) and “Grey’s Anatomy” (8 p.m., ABC), both of which see season finales next week.

“Smallville” continues to get cooler in its old age by adding more and more characters from the DC Universe canon to the show. Tonight: Dinah Lance, a.k.a. Black Canary :

The actress is Alaina Huffman, and the look seems to be fairly heavily influenced by Darryl Hannah in “Blade Runner.” As you can see, the character has, for better or worse,  retained her trademark fishnets:

This isn’t the first time Black  Canary has been on TV. In the short-lived and best forgotten 2002 WB drama “Birds of Prey”, also based on DC comics history, she was played by Lori “Aunt Becky” Loughlin.