Missing: Kyle Jenkins
Jack's had bad luck with children. He got another "surprise" son when he learned that Diane had stolen his sperm. This was a particularly uncomfortable situation since he was with Phyllis at the time and she'd lost her baby. Diane and Jack endured a nasty custody battle over little Kyle, with Jack winning out. But when his and Phyllis's marriage went south, he gave his son to Diane, with whom Kyle has been living ever since — though Jack did recently express regret because he's not really in the boy's life.

Missing: Heather Stevens Lynch
Paul was less than thrilled when his first wife, April, became pregnant. He was somewhat supportive when the baby had a health scare, but when Heather pulled through, he and April divorced. Save for a brief visit in 1994, Paul barely speaks of his daughter, who lives in New York with her mom. Though given his less-than-stellar track record as a P.I., we're not really surprised that someone that close to him has remained MIA.

Missing: Keemo Volien Abbott
Okay, so Jack first learned about his son in 1994, when Keemo was already an adult, but still — when's the last time Jack has even mentioned his offspring? Jack remarried his one-time Vietnamese love, Luan, but after she died from a terminal illness, Keemo returned to his native country ... and has since seemingly been erased from Jack's memory.

Missing: Ricardo Williams
Paul's second child was born after he had an affair with Isabella. This time, he actually tried to be a dad to his son, but things went very wrong when Isabella attempted to kill Paul's ex, Christine. Now Isabella is in a mental institution and little Ricky is out of the picture.