Encouraged by his daughter to try something new, widower Charles Nieuwendyk answers an ad from a private eye seeking a mole at a retirement community.

Pacific View's group activities give Charles the perfect opportunity to narrow down his list of suspects, but his chumminess raises concerns for Julie.

While Julie uses a lavish gift as bait, Charles tries to connect with Gladys. Virginia encourages Florence to splurge on something she's always wanted.

On a tour of San Francisco's historic sites, Charles and Calbert bond while talking about the past, present and future. Didi and Julie lock horns.

When the pieces click into place, Charles faces the difficult task of revealing his true purpose at Pacific View. Emily helps him unpack the past.