https://cdnph.upi.com/ph/st/th/5701781101582/2026/upi/dc2e2caeba6f36de02362fc08220f2a8/v1.5/Simone-Ashley-Sharon-Horgan-among-Only-Murders-Season-6-guest-stars.jpg" /> Simone Ashley, Sharon Horgan, Jennifer Saunders and more will guest star in "Only Murders in the Building" Season 6, which is set in London.