An accountant and Karen's husband, idealistic and trusting, who navigates the challenges presented by revelations about his wife's hidden past.

The Krupps’ neighbor and Tom's former affair partner, who is unhappily married and becomes increasingly obsessed with the couple.

An experienced and diligent investigator dressed in a smart, expensive suit, focusing on unraveling the complex case involving the Krupp family.

Rasbach’s junior partner, known for his creative thinking, who helps brainstorm various possibilities for the case they are investigating.