Here’s a quick prediction: Michelle Obama’s appearance on NCIS next month will be a huge disappointment. It has been revealed that, in the forthcoming episode Homefront, the first lady will host NCIS special agent Leroy Jethro Gibbs at the White House for a discussion about her military charity, Joining Forces.That’s it. What a wasted opportunity. Not that we shouldn’t have seen it coming, of course – over the past couple of years, the Obamas have embarked on a highly targeted media assault in a bid to reach audiences that might not otherwise be engaged by traditional political discussion. That’s why...