Mrs Sykes is a nurse who kept Rebecca White captive in September 2018 on the orders of Rebecca's nephew Lachlan. The nurse gave Rebecca sleeping pills every few hours except to give her tomato soup. When the nurse found some pills Rebecca had spat out, the nurse threatened to call Lachlan. Although Rebecca obeyed her, the nurse tried to call Lachlan but he wouldn't pick up. She told Lachlan he had one more day before she would "end things", but as the nurse turned on the television, she found a news report about the search for Rebecca and discovered Lachlan is in custody on suspicion of the murder of Paul Tozer.