There is quite a few sex references which are never that strong or crude.

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Kerry and Kurtan have a few mild scraps and argue quite a lot, never too bad.

Every episode there is frequent uses of 'fuck'. There is usually about 10 or more uses every episode.

In the first episode there is a reference to the word 'cunt'.

There is uses and references to alcohol.

The last episode of every series is usually quite upsetting

Series 3 is considerably more melancholy than the previous two. The show overall gets more melancholy towards the end