The first series of The Traitors Ireland was first broadcast on RTÉ One on 31 August 2025. The series concluded on 23 September 2025 where Oyin Adeyemi, Kelley Higgins and Vanessa Ogbonna won as Faithfuls, while Ben Donohue placed as a runner-up, as a Traitor.

Format Over twenty contestants arrive at a castle in Meath where they will spend their entire time for the duration of the game. On the arrival day, host Siobhán McSweeney picks at least three contestants to be called "Traitors" and the rest are automatically called "Faithful".

At the end of each day, all contestants meet at a Round Table to discuss who they think are Traitors. They then cast votes that are revealed one by one. The person with the most votes reveals their identity and is immediately banished. On most nights, the Traitors meet in private and agree to "murder" one Faithful who leaves the game immediately. The remaining Faithful only know who has been murdered at breakfast next morning.

Each day, the group participates in missions to win money for the prize fund which can reach up to €50,000 by the end of the game. During the missions, any contestant may separately win a shield that awards that player immunity from being murdered, but not from being banished. In some cases, the contestant has the right or ability not to disclose if they won the shield, or to tell a restricted group.

If during the game the number of Traitors drops to two, they are given the option to "seduce" or recruit a Faithful to join them instead of murdering. Seduced Faithfuls may decline and can decide whether to tell the other Faithfuls of the attempted seduction. If only one Traitor remains, the seduction happens as a face-to-face ultimatum; if the player declines they are immediately murdered, and if they accept the pair can immediately murder another Faithful.

Contestants Contestants were revealed on 31 August 2025, shortly before the premiere of the series. Amongst the contestants was a secret father and son pair, Andrew and Paudie.

+List of The Traitors Ireland contestantsContestantAgeResidenceOccupationAffiliationFinish 39 Portlaoise Artist and holistic therapist rowspan="1" Eliminated(Episode 1) 48 Dublin GardenerFaithfulMurdered 54 Kilronan Radio presenterFaithfulBanished 25 Clonoe Teacher FaithfulMurdered 45 Wexford Financial directorFaithfulBanished 52 Dublin Sports leader FaithfulMurdered 24 Lahardane DoctorFaithfulBanished 53 Cork FirefighterFaithfulMurdered 36 Cahir GardaTraitorBanished 32 Galway Leadership consultant TraitorBanished 33 Cork Civil servantTraitorBanished 38 Durrow IT analyst FaithfulMurdered 55 Westport Restauranteur/former casino managerFaithfulBanished 38 Ballincollig TherapistFaithfulMurdered 68 Kilmallock Retired prison officerTraitorBanished 35 Dublin Apprentice tattoo artistFaithfulMurdered 39 Kildare Logistics specialistFaithfulBanished 44 Dublin Field engineer FaithfulMurdered 27 Dublin Event coordinatorFaithfulBanished 30 Wicklow Estate agent TraitorBanished 33 Dublin Irish Defence ForcesTraitorBanished 23 Letterkenny Business graduate FaithfulWinner(Episode 12) 23 Dublin ModelFaithfulWinner(Episode 12) 28 Tramore Content creatorFaithfulWinner Notes

Elimination history Key The contestant was a Faithful The contestant was a Traitor The contestant was murdered by the traitors The contestant was banished at the round table The contestant was immune at this Banishment and Murder

Episode 123456789101112Traitors'Decision rowspan="4" DavidNiallMicheleJohnNickAndrewNickMark ChristineBenAmyWilkin rowspan="3" MurderSeduceBlackmailBlackmailMurderBlackmailMurder ShieldKatelyncolspan="2" OyinChristineVanessaKelleyBanishment Diane Nina Linda Eamon Katelyn Tie Andrew Patrick Paudie Joanna Faye NickVote Andrew's Choice 13–5–1–1–1 1–1–1 10–5–1–1–1 1–1–1 10–5 7–7 7–58–4 7–2 5–1 3–2KelleyNovoteDianeEamonLindaEamonKatelynPatrickPatrickWilkinVanessaJoannaFayeNickOyinDianeEamonEamonEamonKatelynAndrewAndrewPatrickPaudieJoanna FayeNickVanessaDianePaudiePaudieEamonKatelynAndrewPatrickPatrickPaudieJoannaFayeNickBenDianeNinaPaudieEamonAndrewAndrewAndrewPatrickPaudieJoannaFayeVanessaNickDianeNinaLindaEamonAndrewAndrewAndrewPatrickPaudieJoannaFayeVanessaFayeDianeLindaLindaPaudieKatelynAndrewAndrewPatrickPaudieJoanna OyinBanishedWilkinDianeChristineLindaKelleyKatelynPatrickAndrewPatrickJoannaJoannaMurderedJoannaWilkinNinaLindaAndrewAndrewPatrickAndrewWilkinVanessaVanessaBanishedAmyDianeNinaLindaWilkinKatelynPatrickPatrickPatrickVanessaMurderedPaudieDianeNinaPatrickKatelynKatelynPatrickPatrickPatrickNickBanishedChristineWilkinNinaLindaKatelynKatelynPatrickPatrickWilkinMurderedPatrickNinaNinaLindaPaudieKatelynAndrewNovoteWilkinBanishedMarkPaudieEamonPaudieEamonAndrewAndrewAndrewMurderedAndrewGemmaJohnWilkinNinaLindaEamonKatelynPatrickNovoteBanishedKatelynNovoteWilkinPaudiePaudiePaudieAndrewBanishedEamonDianeOyinPaudiePaudieBanished JohnEliminated(Episode 1)NoVoteLindaMurderedLindaNovoteDianeOyinKatelynBanishedMicheleWilkinNinaMurderedNinaDianePatrickBanishedNiallDianeMurderedDianeVanessaBanishedDavidMurdered GemmaEliminated(Episode 1)

End game Episode12DecisionBanishBenEnd GameGame OverFaithfuls WinVote4–03–1 3–0KelleyBanishBenEnd GameWinnersOyinBanishBenEnd GameVanessaBanishBenEnd GameBenBanishVanessa Banished Notes

Missions