In the week the same sex marriage survey results will be announced, Four Corners will take you into the battle for control raging inside the Liberal Party. As reporter Michael Brissenden will show, whatever the results of the postal survey, the politicking will be far from over. When Malcom Turnbull took the leadership of the Liberal Party he promised to do things differently, end the slogans and act decisively. But for the last two years he's been unable to stamp his authority on his government. The Prime Minister has been held back by the conservative forces in the party, stoked by the man he deposed, Tony Abbott. Divisive debates inside the party over same sex marriage, energy policy and climate change have become proxy wars for the bitter internal battle underway. Social conservative activists are feeling energised and more confident by the day and as Four Corners will show, they're playing a long game to take over the direction of the party, branch by branch. These activists warn that if they're unsuccessful in taking control of the party, they'll take their votes elsewhere. In what will become a momentous week in Australian politics, Four Corners examines the Liberal Party's identity crisis and what it means for Malcolm Turnbull's leadership.

Four Corners is Australia's premier television current affairs program. It has been part of the Australian story since August 1961, exposing scandals, triggering inquiries, firing debate, confronting taboos and interpreting fads, trends and sub-cultures. Its consistently high standards of journalism and film-making have earned international recognition and an array of Walkleys, Logies and other national awards.