Tempers flare at Chevening House, where an unexpected guest's arrival sends Kate and Dennison scrambling for a resolution. Hal makes a new connection.

To appease Trowbridge, Kate seeks Hal's help with a high-profile visitor and consults an informed source in secret as complicated feelings begin to grow.

A lavish Fourth of July party gives Kate a chance to help Dennison, who sees an opportunity after the prime minister's announcement about Lenkov.