James Hibberd

With the strike entering its second day, several sitcoms have shut down production, including Fox’s “Til Death,” CBS’ “The Big Bang Theory” and “Two and a Half Men.”

Sitcoms were expected to be among the first wave of shows to hit by the strike. The production process for multi-camera comedies includes rewriting of scripts right up until the day of shooting, which means they were on a short leash once the scribes walked.

The reason some comedies are still in production is because they are single-camera shows, and therefore require shots planned further in advance—along with completed scripts to plan those shots. However, one studio representative cautioned that such reasoning could not be applied in every case.

Here’s the current list:

CBS: “Big Bang,” “Two and a Half Men” and “Rules of Engagement” are shut down. “How I Met Your Mother” is still in production this week.

Fox: “Til Death” and “Back to You” are shut down (the latter actually is on a scheduled hiatus and was due to commence production tomorrow).

NBC: “My Name Is Earl” is still shooting. “The Office” was heavily picketed and media reports suggest the production was disrupted, if not officially shut down. “Scrubs” is still in production. "30 Rock" is in production and sources say Tina Fey, who walked the Rockefeller Plaza picket lines Monday, has returned to work as an actress on the show.

ABC: The network's lineup of single-camera comedies have been not been impacted by the strike so far. "Notes From the Underbelly" is still in production. "Carpoolers" is still in production and will wrap its order tomorrow. "Cavemen" is still in production on its final script. "Samantha Who?" is still in production. "Miss/Guided," which is scheduled for midseason, just wrapped.

The CW: “Aliens in America” remains in production. “Everybody Hates Chris” has wrapped for the season. “Girlfriends” and “The Game” remain in production.

Click here for complete coverage of the strike.

1:40 p.m.: Updated status of "30 Rock"