Katherine Ryan claims there is a 'perpetrator of sexual assault' working in British showbusiness.
The Canadian-born comedian, 40, said she decided to go on a programme with them, even though she believed the person 'is or was dangerous'.
She says she made a 'compromise' to go on a show with the unnamed comedian, but made sure to 'let him know under no uncertain terms what I think of him'.
Ryan made the recent claims on today's (1 October) episode on the BBC Radio 4 show, where she spoke about her journey from Sarnia in Ontario, Canada, to becoming a regular on British TV.
Today's episode, which was recorded on on 6 September, saw Ryan claiming that people were already aware of the person's reputation.
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When she called them out, she said that fellow colleagues 'really liked what I said'.
Host Lauren Laverne mentioned an interview she did with Louis Theroux last year, where she confronted a male comedian over allegations he was a sexual predator.
Revealing why she has chosen not to name the comedian, Ryan explained: "[I got] a lot of 'why won't you say who it is?'.
"It's because everyone knows who it is, what they want is the women's names, and that's what I won't give and that's why I'm reluctant.
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"No one's asking for his name. It's funny how people go straight to accusing 'you're the problem, you won't give his name'.
"We're not the problem. I had a choice - I could go to work with someone who I believe to be a perpetrator of sexual assault or I could turn down the job. Those were my options.
"And so I wrestled with that. I thought what am I meant to do in this instance?
"The choice is, do I go to work with someone who I think is very problematic, and do I stand near them and laugh and smile and look like I am allowing this kind of person to still be on television? Or do I stay home?"
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"My compromise was I'm going to go and let him know under no uncertain terms what I think of him," she said.
"I'm not just going to allow this behaviour, I'm not going to let him think that I don't know and that everybody he works with is just going to let him get away with it.
"So that is the attitude I took into the show. And did I do the right thing or the wrong thing? I still don't know.
"But I just felt why should I stay home? He should stay home, but if he's going to be there, I'm going to be there to tell him what I think."
Topics: Celebrity, UK News, TV and Film
Anish Vij