The show will star Eliza Dushku, who played bad-girl vampire slayer Faith on "Buffy," E! Online reported.
"Firefly" and "Angel" writer/producer Tim Minear also will be involved in the new series about people who can be imprinted with personality packages, including memories, skills, language -- even muscle memory -- for different assignments, which they then forget when the job is over.
"Those with the money or connections can access this secret highly illegal facility where they can basically fulfill their greatest fantasies," Whedon told E!
"They can basically reenact scenarios of romance, adventure or anything perfectly because (these beings) become the person that you want them to be...
The problem is ... Dushku's character stops forgetting. She doesn't completely remember, but she does realize she is a person, and that she might have been a person before she did this, and she doesn't know what that is."
Whedon said the threat of a possible writers' strike makes it difficult to pinpoint exactly when the proposed episodes can be written and production on the show started.