Mike speaks with Dr Marjorie Collins about what science says about déjà vu. Up to 97% of people experience this strange sense of familiarity, often more than once.

The leading theory suggests it’s a brief glitch in the brain’s memory system, where the present feels like the past.

Dr Collins explains who is most likely to experience it - and why tiredness, stress, and increased dopamine can make déjà vu happen more often.