INVESTIGATION DISCOVERY EXPERIENCES DOUBLE DIGIT GROWTH IN PRIME AMONG P2+, CLINCHING BEST AUGUST EVER

-- ID Continues Reign as #3 Network on Television for Women in Total Day --

(Silver Spring, Md.) - Investigation Discovery (ID) clinched its best August ever for L+3 in Prime delivery among P2+, HH, P25-54, W25-54, M25-54, P18-49 and W18-49 , completing six consecutive months of year-over-year Prime delivery growth among P2+, HH, W25-54 and W18-49, and double digit growth among P2+, HH, P25-54, P18-49 and W18-49 (see chart below).*

In August, ID continued its reign as the #3 ad-supported cable network on television for W25-54 and the #6 ad-supported cable network for P25-54 in Total Day,** also experiencing the best August ever in Total Day delivery among P2+, HH, P25-54, and W18-49, with year over year double digit delivery growth among P2+, W25-54, P18-49 and W18-49.

Notably, the season five premiere of Homicide Hunter: Lt. Joe Kenda on Tuesday, August 18 at 10/9c broke ID's record for best Prime telecast ever for delivery among P2+ (1.86 million) and HH (1.562 million) for L+3. The premiere ranked #4 for delivery among HH in its time period in all ad-supported cable, and ranked #5 for delivery among P2+ and W25-54 delivery in its time period in all ad-supported cable. Overall, the Homicide Hunter premiere helped bolster ID to have its best Prime night ever for delivery among P2+ (1.495 million) and HH (1.218 million).

Other series in the top five for August included On the Case with Paula Zahn (averaging 1.4M P2+); Deadline: Crime with Tamron Hall (1.2M P2+); Killer Instinct with Chris Hansen (1.1M P2+) and Swamp Murders (1.1M P2+).

In August, ID held onto the #1 spot in Total Day (48 min. P25-54, 51 min. W25-54) for Length of Tune in all of television, while securing the was #1spot in Prime (28 min. P25-54, 30 min. W25-54) for Length of Tune in all of ad-supported cable.

August '15 vs. August '14: Primetime Delivery (L+3 Day data)
P2+ +19% (901k vs. 760k)
HH +14% (752k vs. 659k)
P25-54 +10% (375k vs. 340k)
W25-54 +9% (254k vs. 232k)
P18-49 +18% (304k vs. 257k)
W18-49 +12% (202k vs. 181k)

August '15 vs. August '14: Total Day Delivery (L+3 Day data)
P2+ +11% (644k vs. 581k)
HH +7% (561k vs. 526k)
P25-54 +5% (293k vs. 278k)
W25-54 +10% (205k vs. 186k)
P18-49 +12% (240k vs. 215k)
W18-49 +15% (168k vs. 146k)

About Investigation Discovery

Investigation Discovery (ID) is the leading mystery-and-suspense network on television. From harrowing crimes and salacious scandals to the in-depth investigations and heart-breaking mysteries that result, the "always revealing" network challenges our everyday understanding of culture, society and the human condition. One of our nation's fastest growing cable networks, ID delivers the highest-quality programming to nearly 86 million U.S. households and is available in both high definition (HD) and standard definition (SD). For more information, please visit InvestigationDiscovery.com, facebook.com/InvestigationDiscovery, or twitter.com/DiscoveryID. Investigation Discovery is part of Discovery Communications (Nasdaq: DISCA, DISCB, DISCK), the world's #1 pay-TV programmer reaching nearly 3 billion cumulative subscribers in 220 countries and territories.

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*Source: Nielsen, 1/27/08-8/30/15, L+3 Day data, Prime (M-Su 8p-11p), Total Day (M-Su 8p-11p), Time Period Averages for Dayparts, Program Based Averages for series highlights.

**Source: Nielsen, 7/27/15-8/30/15, Total Day M-Su 6a-6a, L+3 Day data, P/W25-54 delivery, Time Period Based Averages, Ad-supported cable, excluding ADSM and NAN for P25-54.