Ep 2. If Dogs Run Free: Part 2

Frost considers retiring from the Police force and plans to get married, ending the series, however DS George Toolan dies of heart failure following a collision outside the church where the wedding is about to take place. It is noteworthy that three alternate endings were filmed, where Frost, Toolan or Mullet die of heart failure in hospital. David Jason chose the 'happier' ending and weds his new love Christine Moorhead..