Delphine

Within These Walls is a British television drama programme created and written by David Butler. Produced by London Weekend Television for ITV, broadcast between 1974 and 1978, the series portrays life in HMP Stone Park, a fictional women's prison. Unlike the later women-in-prison series Prisoner and Bad Girls, Within These Walls tended to centre its storylines around the staff rather than the inmates. Plots typically revolve around well-groomed, genteel governor Faye Boswell's attempts to liberalise the regime while managing her private life.

Sarah and David Kirsten are tourists from the 21st century who take a forbidden holiday in 1938 Mexico. But enforcers from the future, trying to keep the time-stream free from pollution and paradox, are on their trail. Can they evade their pursuers without betraying their origins?