Eleventh Hour stars Rufus Sewell as a biophysicist who investigates unusual scientific happenings.

CBS has greenlit five additional scripts for Jerry Bruckheimer's Eleventh Hour, bringing the drama's freshman run to 18 total episodes.

To date, Eleventh Hour has averaged a decent 12 million viewers in its après-CSI berth. That said, the thinking is that CBS came up shy of a full-season pick-up because, before the year is up, it may want to try another show in the plum slot, one that might retain more of CSI's audience. According to the Reporter, the possibilities include the midseason thriller Harper's Island (watch my related video Q&A with Harry Hamlin) and a relocated Mentalist.

Eleventh Hour is this TV season's second most-watched new show, trailing The Mentalist.