<Tr> <Th> Children </Th> <Td> Will Grover (son) Samantha Grover (daughter) </Td> </Tr> <P> Captain Louis Purnell "Lou" Grover is the former head of the Honolulu Police Department SWAT Team . He was often at loggerheads with McGarrett over what he felt was Five - 0's tendency to be trigger - happy with armed suspects and refusal to obey a "wait for SWAT" order, to the point where he lodges an official complaint with Governor Denning . The Governor dismissed Grover's complaint and then promptly orders the duo on an assignment to serve a warrant for a computer hacker . By the latter half of Season 4, he is fully accepted into the Five - 0 ohana . In the season 4 finale, Grover's actions to rescue his daughter result in forced early retirement from HPD, but also allows McGarrett to recruit him to be part of the Five - 0 team, which he accepts . The character was named after a Captain Grover (Scott Brady) from the original series . </P> <P> A 25 - year veteran of the force, Grover graduated from the Chicago Police Academy in 1989, and was promptly recruited by the FBI to go undercover in the Philadelphia Black Mafia . Upon the completion of the assignment, he returned to the Chicago Police Department . He left Chicago around 2012 or 2013, after an incident where he blames himself for having failed to save a boy who was taken hostage by his father, which ultimately resulted in a murder - suicide . </P> <P> He and his wife Renée (portrayed by Michelle Hurd) have two adolescent children: daughter Samantha (portrayed by Paige Hurd) and son Will (portrayed by Chosen Jacobs). The Grovers are a close - knit family and Lou is shown to be a doting father who is fair but firm with his children . As Danny also has a daughter, Grover sometimes gives him tips and unsolicited advice on dealing with preteens . Although he loves his wife and vice versa, he has a tendency to forget important dates such as birthdays, anniversaries and Valentine's Day . In season 6, he forgets about Valentine's Day and hastily makes plans but Renée saw through it and he ends up in the doghouse as a result . The Grovers live in the Honolulu neighborhood of Manoa . </P>

Who plays danny's ex wife on hawaii five o