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.

Charles charms his fellow residents at happy hour while finding his footing as a sleuth. But will a mysterious warning end the case before it even begins?

Charles has some explaining to do when Emily unexpectedly arrives in town — and another missing item lands him in Elliott's cranky crosshairs.

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.

As the Pacific View community reels from a sudden loss, Charles goes on an emotional journey with Emily. Didi weighs an intriguing offer from corporate.

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.

When a college president's secrets fall into the wrong hands, Charles poses as a visiting lecturer on campus to sniff out an anonymous blackmailer.

While Julie enlists an unlikely expert to dig into new evidence, Charles finds himself on thin ice when his professional and personal lives intersect.

A briefing with Brad turns into a chaotic brainstorming session. Emily gets called in as backup when her dad has lingering doubts about Mona.

The blackmailer's pressure escalates, a new suspect emerges and a cherished school tradition forces Charles to navigate a glittering gauntlet.

The Nieuwendyks' Thanksgiving dinner comes with a side of commotion as an overstuffed table and a pie-related crisis test everyone's holiday spirit.

Out of leads, Charles and Julie wonder if they've been searching in the wrong direction all along. Work takes a backseat when Mona and Emily play hooky.

Charles turns a class reunion into a high-stakes heist, complete with code names, sleight-of-hand and a crew of operatives with more heart than skill.

As the final puzzle pieces of the Wheeler case fall into place, new doors open for everyone — detectives and suspects alike.