http://www.bbc.co.uk/news/entertainment-arts-39416508 Corrie fans were left with a classic soap cliffhanger on Monday after Ken Barlow (William Roache) was found at the bottom of his stairs unconscious. And fans were left wondering if he fell or he was he pushed. Long-running Street resident Barlow suffered a stroke in the autumn, so many wondered if he was ill again. But with Barlow having rubbed up family members, neighbours and acquaintances the wrong way in recent weeks, could he have been shoved? We take a look back at some of the best of TV's whodunnits from over the past few years. Who shot JR? Who could forget this long-running saga involving the Dallas oil baron we all loved to hate? It took eight months for viewers to discover that JR's sister-in-law and former mistress, Kristin Shepard. But not before JR's long-suffering wife Sue Ellen got the blame first and was jailed. T-shirts printed with the slogans "Who Shot JR?" and "I Shot JR" flew off the shelves in the summer of 1980. The storyline became one of television's first big water-cooler moments and prompted pretty much every soap going to get in on the cliffhanger act.