Hey, I don't know what is your level in German, but if you're an advanced beginner I recommend you Extr@ German.

Miguel,

As mentioned by Caffeine Overload, it depends on your level.

Extr@ is really good for beginners. Another good series for beginners is Nicos Weg, by Deutsche Welle. It's available on Youtube, but if you check it on their website, you can also make exercises regarding the content. Other good series for beginners are Easy German (by Deutsche Welle available on Youtube), Mein Weg Nach Deutschland (by Goethe-Institut, available on Youtube) and Jojo such das Gluck (again by Deutsche Welle, available on Youtube and Deutsche Welle website, with some exercises).

If you are intermediate, you can try watching Disney films in German, for example. Even though not originally in German, the language is quite easy and you have plenty of options.

If you're more advanced, you can try some series or films. There are many TV films available on Youtube,    Netflix originals are usually available in many languages (including German) or maybe some soap operas (such as Verbotene Liebe). On Youtube you can also find many good documentaries. If you type "Doku"/"Dokumentation" there are loads available, about pretty much anything.

Good luck!

What I have found was a website called "slow German". It shows the Recent news, culture of Germany and also some little stories which can easily to listen and understand.

By the way , "Knallerfrauen" is my favorite TV show auf Deutsch , just like TBBT

Good luck and have fun !