https://cdnph.upi.com/ph/st/th/1001786455078/2026/upi/bf811c9e3991179e6e6b912a89080a4c/v1.5/Big-Brother-to-become-first-prime-time-series-with-1000-episodes.jpg" /> CBS' reality competition series "Big Brother" will become the first prime-time series to air 1,000 episodes on Aug. 27 this summer.