Within These Walls offered an authentic portrayal of day-to-day prison life, as well as the progress of penal system reform, reflecting the shift from a Victorian ethos of punishment to an emphasis upon rehabilitation. Focussing on the trials of a newly appointed governor and her attempts to liberalise the regime of Stone Park, H.M. Prison for women, Within These Walls was a huge success for LWT and would set the template for later series such as Prisoner: Cell Block H and Bad Girls; the series is still fondly remembered more than 30 years after its original screening.

Googie Withers (The Lady Vanishes) stars as the principled and compassionate prison governor, Faye Boswell, whose task is to understand and help the women who find themselves in the closed world of Stone Park. With strong writing and direction, Within These Walls remains a high point of British television drama. This third series, which includes guest appearances from, amongst others, Joan Hickson, John Rhys-Davies and Michael Sheard, was originally screened in 1975.