It's been a bit of a phenomenon in the USA and now Orphan Black seems to be going down reasonably well on this side of the Atlantic too. Tonight's episode see Alison's paranoia spiraling out of control, putting all of the Orphans at risk. Meanwhile, Sarah's hunt for answers is interrupted by a trip to the suburbs and when her world collides with those of her clones, she must decide who to trust with her secret. We'd never be able to keep up.