Ever since Coronation Street began, special effects and shocking stunts have provided a spectacular backdrop to some gripping storylines. In the penultimate episode of the series, we take a look behind the scenes at those explosive moments - from Maya Sharma's mad Monday to the tram crash disaster that marked the show's 50th anniversary. Narrated by Katherine Kelly, there are interviews with cast members past and present, including William Roache, Wendi Peters and Jimmi Harkishin.