Complex sentence: The final episode of the thirteenth season aired as a 2-hour, movie-length tribute starting with an introduction from John Wood, and concluding with a compilation of "Blue Heelers" moments from over its 13-season run.
Split into simpler sentences: The final episode of the 13th season aired as a 2-hour tribute. It opened with an introduction from John Wood and concluded with a compilation of "Blue Heelers" moments from over its 13-season run.