10 Best Doctor Who Time Travel Stories
4. The Pandorica Opens/The Big Bang
Amy's not wrong when she says "this is where things get complicated". In the finale of Matt Smith's debut series, there is A LOT of zipping about and general mucking around with time. Little Amelia is thirsty, so the Doctor steals a drink from an earlier version of little Amelia. The Doctor's trapped inside the Pandorica so zips back to give Rory his sonic screwdriver to release him, after he's already freed. It makes mincemeat of causality and is having an absolute ball.
To look too deeply into the hows and whys of everything would likely cause the whole episode to fall apart, but it's the sort of breezy, zippy, time travel humour you can achieve when you've got a vortex manipulator. Cheap and nasty time travel sure, but also a bloody good laugh.
At the time, a lot of fans complained that it was too complicated for kids. Too complicated for grown-ups perhaps, kids were probably having a whale of a time with how silly it all is. It's the tricksy narrative of Blink blown up to series finale proportions and is one of the all-time great Moffat finales.