Deckard is introduced to Rachael by Tyrell

Deckard is confronted by Captain Bryant

This scene shows that Deckard is a tool for the people in power – he is being forced into a situation that he doesn’t want to be involved with because Bryant implicitly threatened him if he did not cooperate and kill the replicants.

Rachael and Deckard love scene

The District attorney interrogates spade

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This scene shows how Spade is hostile to authority and it shows that the people in power are detrimental to Spade’s investigation by trying to get in his way. This is similar to the way that Bryant threatens Deckard in Blade Runner