Currently ranked fourth among major television networks, NBC is hoping to find ratings gold in a new batch of pilots they recently ordered. Among them are the comedy Downwardly Mobile, which will mark the return of Roseanne Barr to a television series and additional comedies from writer Scott Silveri (Friends) and writer Scot Armstrong (The Hangover 2). Barr’s project with Eric Gilliland (Roseanne), which she will also write and executive produce, stars the comedienne as an owner of a mobile home park who becomes a surrogate mother to her hard-luck tenants. So far, the network has also ordered the drama County by writer/producer Jason Katims (Friday Night Lights) and the Dick Wolf (Law & Order) action drama, Chicago Fire. Hit the jump for more on each project.