From aliens in the wi-fi to a brain leech under a hat, from some bad nannying to a trio of idiots with a really big space magnet, it\u2019s been an odd half-season for our favorite Time Lord. Here\u2019s our recap of the second half of series 7 of \u201cDoctor Who.\u201d Plus: The Spoiler Horn makes it safe for everyone who wanted to learn the Doctor\u2019s real name.