Each of the characters is motivated by some kind of
hope.
Brigid O'Shaughnessy hopes to keep the falcon to
herself and make a lot of money from it.
Miles Archer hopes
to have an affair with Brigid.
Archer's wife Iva hopes to
get a divorce and marry Sam Spade.
Spade hopes to capture
the person who killed his partner.
Caspar Gutman has been
hoping to get possession of the falcon for seventeen
years.
Wilmer Cook hopes to marry Rhea Gutman. This vain
hope explains his steadfast loyalty to his employer,
Gutman.
Lieutenant Dundy hopes to send Spade to San Quentin
for murdering Miles Archer or for murdering Floyd
Thursby.
Joel Cairo hopes to get possession of the falcon
for his employer, General Kemidov.
Effie Perrine hopes to
break up the romance between Iva Archer and her employer Sam Spade. She may be the only
one to have her hopes realized.
Floyd Thursby hoped to
share the profit from the falcon with Brigid.