LOS ANGELES -- Fox Broadcasting Co. has announced six new prime-time series as it prepares to expand its national program service.

The Fox plans include a variety show starring Nell Carter, a comedy about women behind bars and a "blue collar" nighttime soap opera from the producer who made "General Hospital," the high-rated daytime serial.

No specific date or week night was set for the shows, but Garth Ancier, head of programming for Fox, said Friday that some of the shows would probably make their debut in March on Friday nights.

Others could be used as replacements for shows currently on Saturday and Sunday nights.

Fox said it had also ordered 13 more episodes of two Saturday night shows, "Werewolf" and "The New Adventures of Beans Baxter." Another Fox show, "Mr. President," starring George C. Scott, will be changed from a single-camera show to a four-camera show filmed before an audience.

The new Fox shows are:

"The Nell Carter Show," a one-hour variety show with the former star of NBC's "Gimme a Break."

"Women in Prison," a comedy about women serving behind bars. No cast announced.

A one-hour drama-comedy from Dennis Klein, a writer-producer from NBC's "Buffalo Bill."

A "blue collar" soap opera to be developed by Gloria Monty, who guided ABC's "General Hospital" from near-cancellation to the top of the daytime ratings.

"The Family Man," a domestic comedy now in production.

"Second Chance," a drama starring Kiel Martin, formerly of "Hill Street Blues."