Fox has given an early renewal to suspense thriller "Prison Break", granting it a second season just days after it returned to strong ratings last week, the first new episode after a four-month hiatus.

In its two Monday 8 p.m. airings, Prison Break has increased Fox's season-to-date ratings in the slot 57% among adults 18-49, averaging a 4.4/12. The series has improved Fox's numbers by 81% in the 18-34 demographic.

Prison Break joins American Idol, Bones, The Simpsons, King of the Hill and Family Guy as shows the network has already renewed.