[Kojak]

The BR music was apparently composed by the same company who did Hart van Nederland, so if anything that is a case of a composer ripping off their own work!

I think it's one of the reasons that we have to be careful necessarily calling 'plagiarism'. While there are some cases where somebody has clearly just ripped something off, it can often be more of a grey area - there are a lot of 'homages' and deliberate similarities in news presentation because a) certain composers, designers or design houses have certain 'styles' that they personally prefer or work to; b) it is not uncommon for broadcasters to explicitly commission things to be e.g. BBC-esque; and c) there are even some occasions where broadcasters in other countries do co-operate with each other ahead of rebrands.

Yes, I completely agree. For what it's worth, the composers of the German and Dutch themes above are a very big deal in TV music. Martijn Schimmer and his production company have written music for pretty much every Dutch TV channel and - most notably -  the themes to the various versions of The Voice. So they are probably the least likely to rip anyone else off (not that anyone is suggesting they did in the first place!).