Television in Germany is in German. Period. As opposed to Scandinavian countries, the tradition of dubbing a foreign series, soap, or movie is widespread. Programmes are extremely seldom shown in the original, often English or American language with or without subtitles. The concept of dual channel such as in Spain does not exist.
Along with its southern neighbours such as France and Spain, the business of translating and dubbing into German is huge. Some say to the disadvantage to the young, pointing to the language capabilities of Nordic nationalities.
Mobile streaming of foreign TV prorgrammes is highly limited due to licensing issues, which leaves just a few channels such as CNN and BBC World available on cable or satellite. Depending upon the home, one or the other should already be available on the system installed.
Many expats say it is possible to trick the system and install freeview and similar systems imported from abroad. A Google search reveals more. Others may enjoy the opportunity to get a feel for the phonetics of German and free help in learning the language.
The cable television or tv service in Düsseldorf is provided by Unity Media. Sky TV is available with restricted original language offerings.