Armchair Thriller S01 E11 The Girl Who Walked Quickly (Part 1)

When young student David Cooper (Denis Lawson) disappears, both his girlfriend and his tutor suspect he is in danger. David has a paralysing fear of lifts and other confined spaces and, while the duo are searching for him, his phobia is proving invaluable to a menacing group of people with a sinister and ruthlessly violent agenda.