Oscar is being treated for depression. his therapist, annalise, encourages him to notice his unpleasant thoughts and feelings without trying to avoid them or judge them. this is likely an example of:

This is likely an example of mindfulness based therapy

mindfulness based therapy is a depression treatment therapy that focused on relapse prevention.

This type of therapy is proven to be really succesful especially when treating depression cases that are considered as major in term of scale/magnitude (borderline sucidals)