On 5 February 2020 it was announced that Carr had departed Silent Witness after eight years. The man, who is … Silent Witness actress Liz Carr has thanked friends for their support after she was stabbed in the head by an attacker armed with a pair of scissors in each hand. Invalid Date, SILENT Witness viewers hailed the latest emotional episode "hard to watch" as Clarissa Mullery's mum Penny battled both dementia and cancer. In 2019, Carr starred in The OA as Dr Marlow Rhodes. In 2020, Carr appeared as a university lecturer in the miniseries Devs. In 2013, she joined the long-running BBC crime thriller series Silent Witness as regular character Clarissa Mullery.