By Daniel Bird EastEnders fans have worked out a huge twist for Johnny Carter after his return. In recent weeks, viewers saw Linda and Mick Carter’s son return to Albert Square having lived in Manchester for several years. But one worried call from his gran, Elaine, after Linda’s battle with alcoholism reached new levels saw him instantly return. But having noticed that something was up with Linda, he couldn’t have predicted what was going on. After struggling to come to terms following her traumatic Christmas which saw her kill Keanu Taylor, Linda was close to revealing all on several occasio…