Ambassador of Thrace

The Ambassador of Thrace hosted a party attended by the Lady Cassandra O'Brien. Cassandra particularly remembered the party as the last time someone told her she was beautiful.

Many years later the Tenth Doctor and Rose Tyler returned a dying Cassandra (trapped in the body of her servant Chip) to this party. Cassandra died in her own arms thereby creating a (non-destructive) temporal paradox. (TV: New Earth)