Complex sentence: Deckard then escapes and "retires" some androids there before returning to his own police station, but Deckard takes the Voight-Kampff test and it fails to indicate that he is an android.
Split into simpler sentences: Deckard then escapes and "retires" some androids there before returning to his own police station. However, Deckard takes the Voight-Kampff test and it fails to indicate that he is an android.