HOLLYWOOD, Calif. - This has been quite the year for Charlie Day.
"It's Always Sunny in Philadelphia" (10 p.m. ET Thursdays, FX), which premiered in 2005, remains a viable hit among cable comedies. He co-starred in the hit movie "Horrible Bosses" in the summer and has plenty of other big-screen opportunities coming his way. Yet he remains devoted to "Sunny," which opened doors for him.
The star/producer/writer is amazed that the raunchy comedy still has places to go.
"At the end of every season, we get the feeling, 'Well, we've done it all. We can't do anything else,' " Day said recently in his office for "Sunny." "I always feel like we've done it all, and then, the new season comes along, and we're always doing more."
"Sunny" has at least two more seasons ahead of it and maybe more.
With co-stars Glenn Howerton and Rob McElhenney, Day is able to bust taboos of conventional television. This season, "Sunny" has taken uneasy stabs at child beauty contests and poked fun at New Jersey in the wake of "Jersey Shore." Past episodes have touched on making money off abandoned children, and underage drinking.
Day, however, said "Sunny" only works on those topics because a clear line is drawn between good and bad tastes.
"We've done very dark territory," he said, "but I get a kick out of going to dark territories and still making it funny ... because other TV shows or movies aren't willing to go to those areas for comedy, this show still feels fresh.
"When you walk that tightrope, and the audience wonders if they are going to cross the line, it makes it interesting and a challenge for us. If it gets too uncomfortable even for us, we know it's a bad idea to go there."
Other highlights for the week of Nov. 6-12 (listings subject to change; check local listings):
-- "Hell on Wheels" (10 p.m., AMC). This new drama is set just after the Civil War, when a Confederate soldier (Anson Mount) heads west to get revenge on the men who killed his wife. His journey takes him to the place where the transcontinental railroad is being built.
-- "Two and a Half Men" (9 p.m., CBS). When Charlie Sheen's character, Charlie, was killed off, the other characters have almost been rejoicing. In this episode, Alan, his brother, shows that maybe he's not as heartless about the incident after all.
-- "In The Spotlight with Robin Roberts: All-Access Nashville" (10 p.m., ABC). The "Good Morning America" anchor talks with Kenny Chesney and Sugarland, which will address the stage-collapse incident that killed fans this past summer.
-- "CMA Awards" (8 p.m., ABC). Brad Paisley and Carrie Underwood are scheduled to host country music's most popular awards ceremony, airing live from Nashville. Among the talent appearing: Miranda Lambert, Blake Shelton, Keith Urban and Faith Hill.
-- "Braxton Family Values" (9 p.m., WE). Singer Toni Braxton's reality series launches into a second season.
-- "Geek Charming" (8 p.m., Disney Channel). A high-school snob (Sarah Hyland of "Modern Family") finds the nerdish boy she likes could ruin her reputation as being one of the cool kids.
-- "Rage of the Yeti" (9 p.m., SyFy). Treasure hunters find that their quest gets more complicated thanks to angry snow monsters.