Regi DarnellPlayed by Annie Corley
Regi Darnell is Sarah Linden's social worker, the woman who guided the young Sarah during her years in foster care and who witnessed first-hand how Sarah's obsession with an earlier case nearly lost her custody of her young son, Jack. When Sarah delays her move to California to pursue the Larsen case, she and Jack move temporarily onto Regi's boat. Jack, unhappy about the impending move, begins acting out, prompting a warning from Regi that Sarah is again neglecting her child. Stung by the accusation, Sarah packs her bags and moves into a motel with Jack.