There are a couple of weird scenes involving the landlady’s young teenage daughter, Amber. She’s rarely shown onscreen, but the adult Tim imagines her dancing in a way that implies he is fantasising about her and her friends.
The landlady is quite sexually aggressive towards a male character, which is played for laughs. Eventually he reciprocates her advances (but it’s implied that he might have done so to put her in a good mood, so that she lets Tim and Daisy keep the flat).
Characters sometimes smoke weed, take drugs, or drink alcoholic beverages, although it is never shown in an addictive manner, rather just an experimental and careless depiction of being "adventurous" in your twenties.
Not necessarily anything graphic, but Tim is often depicted as having some sort of weird infatuation with Marsha (the landlords) daughter. Typical creepy late 90s early 2000s fetishization of teenagers.
A character is shot in the genitals with a paintball gun, although there is nothing graphic and it is a comedic scene. The character is later shown on a stretcher being lifted into an ambulance, also played for laughs as the character is notably an "enemy" of Tim.
In S1 E1, Tim and Daisy see something that makes them suddenly scream when they open the cupboard while viewing the new flat. Later in the episode something suddenly jumps out from the tall cardboard box Daisy finds while looking for Tim.
In S1 E2, in the dream sequence at the beginning, a monster jumps put at Tim after his ex says "As if".