Game Of Thrones: 10 Flashbacks That Need To Happen
9. The Lannisters Of Casterly Rock

We know Cersei hated Tyrion from the start, we know Cersei and Jaime's attraction started early on, and we know their childhood was spent under the watchful eye of Tywin, but it would be great to finally see Casterly Rock in a flashback.
The three 'children' are all integral to the key storyline and therefore if any major conflicts should arise in Season 6, or even a death, the writers could link present incidents back to events from their childhood.
It is common knowledge that Tywin's wife Joanna died during childbirth with Tyrion, though there is a fan theory suggesting that she was previously raped by the Mad King Aerys II, with other fans going as far as suggesting Tyrion was the product of that incident. A half Targaryen Tyrion... Now that's a fascinating prospect, though there's no way of knowing whether it's true yet.