All four of CBS’ Monday-night sitcoms have new episodes scheduled for February 8.

How I Met Your Mother even features a couple of cool voice-only cameos from sports figures Jim Nantz and Phil Simms, both prominent members of CBS’ on-air sports departments.

Veteran television actor and The L Word alum Steven Eckholdt guest stars on “Crude and Uncalled For,” the fresh February 1 episode of CBS sitcom Two and a Half Men.

He plays Brad, Alan’s lawyer, whose help is desperately needed…

In addition to Neil Patrick Harris‘ directorial debut with the new January 18 episode of How I Met Your Mother, CBS’ remaining three Monday-night sitcoms will present new episodes, too.

And featured on Accidentally on Purpose and Two and a Half Men are guest stars Michael Rapaport (My Name is Earl) and Stacy Keach (Titus), respectively.

Lovely. The first new 2010 episode of television’s most popular sitcom — Two and a Half Men, of course — has the partially appetizing title “Fart Jokes, Pie and Celeste.”

Besides the title, the January 11 episode also has recurring cast member Ryan Stiles going for it. The Drew Carey Show veteran plays Herb, the present husband of Alan’s ex-wife Judith.

As CBS accurately puts it, legendary TV producer/writer/actor Carl Reiner (The Dick Van Dyke Show) guest stars on the fresh December 14 episode of Two and a Half Men called “Warning, It’s Dirty.”

The showbiz veteran plays the well-matched role of Marty, a famous television producer.

Coming up on Two and a Half Men is the fresh December 7 episode “That’s Why They Call It Ball Room.”

Things are looking tense between Charlie and his wife-to-be Chelsea.

Alan demonstrates his cheap side yet again on Two and a Half Men’s November 23 episode “Captain Terry’s Spray-On Hair.”

The title refers to the younger Harper brother’s thrifty solution for his thinning hair.

Battlestar Galactica veteran and memorable Chuck and Burn Notice guest star Tricia Helfer (pictured below) makes a highly anticipated visit to Two and a Half Men during the ridiculously titled November 16 episode “Gorp. Fnark. Schmegle.” Huh?

Helfer plays Gail…

The Brothers Harper get a HUGE surprise on the new November 9 episode of Two and a Half Men called “Untainted by Filth.”

Not only do Alan and Charlie wake up in the same bed one day…

Tit — no pun intended — meets tat during Two and a Half Men’s new November 2 episode “Give Me Your Thumb.”

After Alan takes it upon himself to suggest to Charlie’s fiancée Chelsea that she get a certain part of her anatomy surgically reduced (and it can’t be that difficult to guess which part he’s talking about)…