Doctor Who's trilogy of 60th anniversary specials comes to an end with The Giggle, the biggest and, by quite some way, the boldest episode of this show for many years. There's a returning enemy, a global threat, and a long-awaited regeneration - but that's just the half of it.
In some ways these episodes have mimicked the structure of returning showrunner Russell T Davies' seasons past. The Star Beast was a fun and frothy family adventure reminiscent of season-openers like Rose or Partners In Crime. Last week's Wild Blue Yonder recalled the show's mid-season turns to the weird in episodes like Midnight. The Giggle, then, is a classic RTD season finale, epic in scale, with wild swings of tone and mood, big ideas, UNIT battles - and a dance.
