The Chase 's new quizzer Darragh Ennis shared offensive jokes about homophobia and dwarfism before being recruited for the show.
The Irish scientist, who is a researcher at Oxford University, is joining the ITV series as the sixth Chaser - three years after appearing on the show as a contestant.
Mirror Online can now reveal Ennis' Twitter account posted a series of offensive gags before he was lined up as the game show's new addition.
Back in 2017, a message posted on his page made a joke about gay people with learning disorders.
It read: "My friend refused to believe he is gay or dyslexic. I think he's in Daniel."
Another message posted to the account that year was an offensive gag about dwarfism, stating: "Growing up with dwarf parents was very difficult.
"So hard to watch them constantly struggling to put food on the table."
Another joke posted to his account in 2018 had xenophobic undertones as it made fun of German stereotypes.
The post read: "I just deleted all the Germans from my phone contacts so now it's Hans free..."
Mirror Online has contacted a representative for ITV for comment.
Darragh is preparing to join the team at The Chase alongside host Bradley Walsh and regulars including Anne Hegarty and Paul Sinha.
A show source told The Mirror: "Darragh has got what it takes to be a Chaser, he has been put to the test and passed with flying colours.
"They don't bring in new members on The Chase regularly so this is a big deal for the show and Darragh. Viewers will be very interested to see how he gets on.
"The show is so popular with spin off shows now as well so there is a need to increase the team.
"No one is leaving, Darragh is very much an addition to the team."
He previously appeared on the show back in 2017 and lost thousands after he banked £9,000 and his teammates took lower offers.
Viewers were so incensed, they launched a #Justicefordarragh campaign and a crowdfunding page to help him recoup his losses Gofundme.
