In 1995, Viacom and Chris-Craft Industries' United Television launched United Paramount Network (UPN) with Star Trek: Voyager as its flagship series, fulfilling Barry Diller's plan for a Paramount network from 25 years earlier. In 1999, Viacom bought out United Television's interests, and handed responsibility for the start-up network to the newly acquired CBS unit, which Viacom bought in 1999 – an ironic confluence of events as Paramount had once invested in CBS, and Viacom had once been the syndication arm of CBS as well.[1] During this period the studio acquired some 30 television stations to support the UPN network as well acquiring and merging in the assets of Republic Pictures, Spelling Television and Viacom Television, almost doubling the size of the studio's television library.
Lasting eleven years before being merged with The WB network to become The CW in 2006, UPN would feature many of the shows it originally produced for other networks, and would take numerous gambles on series such as Star Trek: Voyager and Star Trek: Enterprise that would have otherwise either gone direct-to-cable or become first-run syndication to independent stations across the country (as Star Trek: Deep Space Nine and Star Trek: The Next Generation were).