If you could add one or more additional episodes to any of the seasons, which seasons would you add new episodes to, where would they fit into the timeline of the game (so between two canon episodes), and what would be the plot of this new episode/episodes? Also, how would they impact the rest of the story?
For example, I'd add an episode between episodes one and two of season one, exploring the early days of the group settling into the motel and how they start preparing for the future. Examples of decisions could be picking sides in an argument about whether or not they should plan on the military coming through soon or prepare for the long haul, choosing between what resources to prioritize in gathering (materials for the wall, guns, food), all while solidifying the relationships that were established in episode one, with Lee getting his first real chances to choose between Kenny and Lilly, helping Carley/Doug to overcome their survivor's guilt, looking after Clementine, antagonizing or trying to appease Larry, all of that.
Depending on who you side with more, either Kenny or Lilly will end up leading the group, which continue into the canon episode two where you get to see the consequences of their different leadership styles. The episode culminates in going to the airforce base where you meet Mark with his supply of food. He ends up attacked by walkers, and you have to decide whether to save him and bring him into the group, or let him die to just take the food without the extra mouth to feed. If Mark was allowed to die, then David Parker will be 'rescued' by the St. Johns after you abandon him and used as the person in the bathroom, or Travis will be that person, with him being separated from the group while fleeing from the walkers in the woods only to be caught by the St. Johns. Other than that, things go more or less like they do in canon, thus melding with the canon storyline.