Who do we need to scan? Behind the constant considerations of irradiation risk and resource usage, there is nuance to be found. Parkinson's disease - being a clinical diagnosis - doesn't suggest a need for imaging, yet one case in this issue argues that should not be an absolute rule. Another paper brings in the context of a specific patient: does one man really need 50 CT scans in his life? There's also an unboxing of uveitis, diagnosis of Alexander disease in adults, and an exploration of connections between the microbiome and neurology. This being the fifth(!) Christmas podcast for editors Phil Smith and Geraint Fuller, they finish with the annual crossword and book club update, featuring hot cross buns and hummingbirds.

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Production and editing by Brian O'Toole. Thank you for listening.