Sean O’Brien- Married to Sorcha (Mullen), father to Aidan, Michael, Brigid, Patrick, Liam, Seany (Sean Jr.), brother of William (deceased) and Maeve, son of Aoife and David. Retired and Reserve Garda Officer. Native to Doolin, Co. Clare, Ireland.
Sorcha (Mullen) O’Brien- Daughter of Michael and Edith Mullen. Sister of John (deceased). Native to Belfast, Northern Ireland. Married to Sean O’Brien with whom she has six children and eight grandchildren. A nurse midwife for over thirty years.
Brigid (O’Brien) Murphy- Daughter of Sean and Sorcha, Michael’s twin, married to Finn Murphy. Mother to Cora, Colin, and Declan.
Finn Murphy- Husband to Brigid. Father of Cora, Colin, and Declan. I.T. expert who works in Ennis but does consulting work with the Garda on occasion.
Cora Murphy- Daughter of Brigid and Finn. Has emerging gifts of pre-cognition and other psychic abilities. Oldest grandchild of Sean and Sorcha.
Michael O’Brien- Son of Sean and Sorcha, married to Branna (O’Mara), three children: Brian, Halley, and Ian. Rescue swimmer for the Irish Coast Guard. Twin to Brigid.
Branna (O’Mara) O’Brien- American, married to Michael. Orphaned when her father was killed in the Second Battle of Fallujah (Major Brian O’Mara, USMC) and then lost her mother, Meghan (Kelly) O’Mara to breast cancer six years later. Mother to Brian, Halley, and Ian. Real Estate investor.
Captain Aidan O’Brien, Royal Irish Regiment- Son and eldest child of Sean and Sorcha O’Brien. Married to Alanna (Falk). Father of two children, David (Davey) and Isla. Serves active duty in the Royal Irish Regiment and currently living in Belfast, Northern Ireland
Alanna (Falk) O’Brien- American, married to Aidan, daughter of Hans Falk and Felicity Richards (divorced). Stepdaughter of Doctor Mary Flynn of Co. Clare. Mother to Davey and Isla. Best friend to Branna. Clinical Psychologist working with British military families battling PTSD and traumatic brain injuries.
Patrick O’Brien- Son of Sean and Sorcha. Married to Caitlyn (Nagle). Father to Estela, Patrick, and Orla. Currently residing in Doolin working as a Garda Officer. Serving on the National Security Surveillance Unit on the Armed Response Team in Shannon.
Caitlyn (Nagle) O’Brien- Daughter of Ronan and Bernadette Nagle, sister to Madeline and Mary. Married to Patrick. Mother to Estela, Patrick, and Orla. Early education teacher. English as a second language teacher for small children. Native to Co. Clare.
Estela O’Brien- native to Manaus, Brazil. Adopted daughter of Patrick and Caitlyn O’Brien.
Patrick O’Brien Jr.- Born in Dublin, Ireland. Adopted son of Patrick and Caitlyn O’Brien.
Orla O’Brien- daughter of Patrick and Caitlyn O’Brien.
Dr. Liam O’Brien- Second youngest child of Sean and Sorcha. Internal medicine and infectious disease specialist. Married to Dr. Izzy Collier.
Dr. Isolde “Izzy” (Collier) O’Brien- Doctor/Surgeon, prior United States Navy. Married to Dr. Liam O’Brien. Born in Wilcox, Arizona. Close friend to Alanna O’Brien. Daughter of Rhys and Donna Collier.
Sean “Seany” O’Brien Jr.- Youngest child of Sean and Sorcha. Serving with the fire services in Dublin. Trained paramedic and fireman. Unmarried and no children.
Tadgh O’Brien- Only son of William (deceased) and Katie (Donoghue) O’Brien. Special Detectives Unit of the Garda. Married to Charlie Ryan.
Charlotte “Charlie” (Ryan) O’Brien- American FBI Agent with the International Human Rights Crime Division. Married to Tadgh. Sister to Josh. Currently working in Europe as the liaison to Interpol.
Josh O’Brien- Formerly Joshua Albert Ryan. Brother of Charlie. Studying Maritime Studies and Lighthouse Maintenance and living with Sean Jr.
Dr. Mary (Flynn) Falk- Retired M.D., wife of Hans Falk. Stepmother to Alanna O’Brien and Captain Erik Falk, USMC.
Sgt. Major Hans Falk, USMC Ret.- American, father of Alanna and Erik. Married to Doc Mary. Retired from the United States Marine Corps.
Maeve (O’Brien) Carrington- Daughter of David and Aoife. Wife to Nolan, mother to Cian and Cormac. Sister of Sean Sr.
Katie (Donoghue) O’Brien- Native to Inis Oirr, Aran Islands. Widow of William O’Brien. Mother of Tadgh O’Brien.
David O’Brien- Husband of Aoife, father of Sean, William, and Maeve. The oldest living patriarch of the O’Brien family.
Aoife (Kerr) O’Brien- Wife of David O’Brien, mother of Sean, William, and Maeve. Originally from Co. Donegal.
Michael Mullen- Native to Belfast, Northern Ireland, married to Edith (Kavanagh). Father of Sorcha and John.
Edith (Kavanagh) Mullen- Married to Michael Mullen, mother of Sorcha and John.
Madeline Nagle- Caitlyn and Mary’s sister, daughter to Ronan and Bernadette Nagle.
Mary Nagle- Caitlyn and Madeline’s sister, daughter to Ronan and Bernadette Nagle.
Jenny- Daytime barmaid at Gus O’Connor’s Pub.
Dr. Seamus O’Keefe- OB-GYN who met Liam and Izzy in Brazil.
Nelson McBride-Seany’s partner in the Dublin Fire Brigade.
Kamala McBride-Nelson’s wife.