This is the time of year when many series start signing off for the season, with fans not knowing if it will be their last, as the networks prepare for upfronts in mid-May, when new fall schedules are unveiled. Today, fans of CBS shows got a preview of what the network’s fall schedule will be like when CBS announced the renewal of 18  primetime series.

Renewed shows include newsmagazines “48 Hours” and “60 Minutes”; reality shows “The Amazing Race,” “Survivor” and “Undercover Boss”; dramas “Blue Bloods,”  “CSI: Crime Scene Investigation,” “Elementary,” “Hawaii Five-0,” “NCIS,” “NCIS: Los Angeles,” “Person of Interest,” “The Good Wife” and “The Mentalist”; and comedies  “2 Broke Girls,” “The Big Bang Theory,” “How I Met Your Mother” and “Mike & Molly.”  The upcoming season of “How I Met Your Mother” will be the show’s last.

Absent from the list: “Two and a Half Men,”  “CSI: NY,” “Vegas,” “Golden Boy” and “Rules of Engagement.” That doesn’t necessarily mean the shows are canceled, especially the inexplicably high rated “Two and a Half Men,” just that fans of those shows can’t breathe easy just yet.

— Heather Chavez