It is revealed that Barrowclough's Christian name is Henry.
It's often mentioned that there are 600 prisoners in the prison but the numbers on the board in the governor's office show a tally of 959.
This Christmas Special was 8th in the charts with an audience of 7.65 million under the JICTAR ratings system.
Dudley Sutton and Jane Wenham ( Urwin and Jamieson), died exactly two months apart in 2018.