A former soldier is arrested on suspicion of murdering three civil rights demonstrators in Londonderry on Bloody Sunday in 1972.
Long marchers from the 2005 Cameron leadership bid will hope it's a return to his original programme of work, but he now faces divisive and headline-hogging battles.
A sense of political intoxication: the enthusiasm, the detail, the debate, and the understanding of the issues was unlike anything I had experienced.
Had Blair withdrawn the whip from Jeremy Corbyn, it would probably have been the end of his political career. And ended any chance of taking the leadership himself 19 years later.
The four contenders clash over immigration, benefits cuts, "making excuses" for Vladimir Putin and the shadow of the Iraq war.
Both educated at Oxford and both married to barristers, but beyond that Ed Miliband and Tony Blair are very different Labour leaders.
Getting answers to difficult questions from politicians can be tough. Channel 4 News presents the top 10 'doorstep' interviews from Political Correspondent Michael Crick, a master of the art.