The triumph of television, which began in the late 1950s, was accompanied by falling attendance figures in cinemas and a sharp decline in new film productions. Like other German media locations, Wiesbaden was also affected by the crisis. In order to compensate for the underutilization of the Unter den Eichen studios, the owner Taunus-Film increasingly rented them out to Hessischer Rundfunk (HR) for TV recordings. In 1959, the five-part entertainment program "Höpfner, zweimal klingeln" was produced with the then landlord of the "Schwarzer Bock", Otto Höpfner. By the following year, the collaboration had progressed so far that the HR (via its subsidiary "Werbung im Rundfunk") acquired a 50% stake in Taunus-Film. In order to meet the requirements of the new medium, investments were made in the expansion and modernization of the infrastructure. A new recording hall, a dubbing studio and additional editing and screening rooms were built. The company recorded colorful evenings such as "Heute letzter Tag" or the one-shot parts of "Einer wird gewinnen" with Hans-Joachim Kuhlenkampff, as well as ballet recordings ("Zwischen Brooklyn und Manhattan"), but also two television plays by Wolf Hädrich: "Die Friedhöfe" (1960) and "Nachruf auf Jürgen Trahnke" (1962).

In addition, the company's business activities focused on the production of advertising programs. In the spring of 1964, the newly founded Second German Television (ZDF) moved its broadcasting center with the current affairs, editorial and technical departments from Eschborn to Wiesbaden, where it was able to use most of the existing technical facilities. A seven-storey editorial building was erected on the neighboring premises of the production company IFAGE (Internationale Film Agentur). On April 1, 1964, Unter den Eichen began broadcasting with 1,454 employees. In the following years, the workforce grew to over 3,200 employees. In addition to numerous commissioned productions, Wiesbaden also produced "Das aktuelle Sportstudio", "Aktenzeichen XY ... ungelöst" with Eduard Zimmermann, "Die Drehscheibe" and "ZDF-Magazin" with Gerhard Löwenthal.

The Wiesbaden-based company Neue Film Produktion (NFP) also developed the "Mainzelmännchen", which have been an integral part of ZDF advertising since the 1960s. With the final completion of the central Mainz-Lerchenberg site at the end of 1984, the last remaining ZDF editorial offices were withdrawn from Wiesbaden, ending more than twenty years of provisional work at Unter den Eichen. Efforts to fill the resulting gap by attracting private television broadcasters were not realized, despite corresponding requests, nor was the establishment of a Wiesbaden television museum.