Silent Witness: why did these former stars leave the show?

• Fans of Silent Witness were delighted when the brand new series of the crime drama returned to screen this month – and they were no doubt even more thrilled by the return of Amanda Burton! MORE: Emma Thompson's daughter lands role in BBC's Silent Witness The actress, who played the iconic role of Sam Ryan from when the show started until series eight, has reprised her part for the 20th anniversary after being asked back by bosses. WATCH: Silent Witness returns for the anniversary special But Ama