You should be fine until S4 – the earlier seasons, especially 1 and 2 mixed the darkness and sadness with humour very well. S4 is a lot darker, but still good.
Grimm also contains lots of storylines about rape, and sometimes they aren’t addressed very well. There is also the blood and gore you would expect from a show like this. If there’s anything specific you would like to be warned about, let us know.
~ Siobhan
Hi there! I’d also recommend checking our “trigger warning” tag if you’d like to see our list of possible triggers for each episode. We’ve covered a good bit of season one and all of season 3-4; eventually we plan to go back and tag for the rest of seasons 1-2 as well.
– Liza