Searching for an episode with brain science about singing

I watched an episode where Daniel helped to reach a traumatized or mentally ill woman no longer able to speak - Daniel told Moretti that the brain uses a
different area to process singing than to process speech -
It was brilliant & true! I am researching music in people with Alzheimer's & dementia and the episode was so spot on!
Does anyone know which episode this was? I have searched through or the episode! Soooo very unhappy this great show was cancelled but glad we can watch again!