Which CBS reality show preceded CSI when it moved to Thursdays in 2001? CSI was preceded by Survivor.
CBS moved CSI from Friday nights to Thursdays at 9 p.m. on February 1, 2001. The series followed Survivor, which occupied the 8 p.m. hour. This pairing brought together a reality-competition hit and a relatively new forensic crime drama, creating one of the network's most effective scheduling decisions of the era.
The move transformed CSI's trajectory. Survivor had already become a major CBS success after its 2000 debut, and its audience gave CSI a powerful lead-in. Together, Survivor and CSI challenged NBC's dominant Thursday lineup, which included the highly successful Friends-era schedule.
The distinction matters because CSI originally premiered after The Fugitive on Fridays. Survivor became its lead-in only after the January 2001 schedule change. Other CBS reality franchises such as Big Brother and The Amazing Race are associated with the network, but neither was the specific show preceding CSI in that Thursday arrangement.