Fingerprint check at the airport.
Fingerprint access control at the hotel (with a curious
form factor...).
Fingerprint check at the sphinx building.
Recording Maria's identity, fingerprint.
Her private book of memories is fingerprint protected.
Maria's flat has a fingerprint access control. William asks
to override the protection.
William and Maria are sharing 50% genetic code... DNA analysis is
taking a few minutes, from hair and buccal cells. And they are able to immediatly
recover William's mother DNA, what a database! (so why is it useful that Williams give some cells? his name should be enough...).
Maria's fingerprint is rejected at the sphinx.
Fingerprint check at the check-in. Maria's new finger is rejected,
so she's using another one.