Cathy Manso, Fia Van Den Bogert, Giorgia Scotto Di Rosato, Alex Lewczuk & William Coles consider festive films with Boyd Hilton, the formula for perfect gravy with Mark Miodownik MBE and Gravy Guru Laura Rowe, festive stress with Chris Mills, and holiday traditions with Annette Andre, Robin Pierce, Graeme Harper and Jessica Burtis.