The Oireachtas Committee on Media will reconvene over the summer if former RTÉ Director General Dee Forbes and current Head of Content Jim Jennings make themselves available, the committee's chairperson has said.
Speaking on RTÉ's This Week, Niamh Smyth said those "two critical voices have been absent from the conversation all along" and that they "had in integral part to play in all of the wheeling and dealing that went on here.
"So there's a huge part of the jigsaw puzzle missing at the moment. Our committee stands ready and available to meet with those particular witnesses if and when they are available to do that," she said.
Ms Smyth said the committee has plans to reconvene over the summer if there is the need.
"Our committee has already agreed in private session that when the Grant Thornton, the second part of that investigation, is published that if there’s a need for us to reconvene, if there’s revelations that come out of that, that we stand ready and available.
"I think we’ve made it quite clear to the voices who have been absent - as in the DG and the Head of Content - that when they’re fit and able, if that is over the summer months, we will absolutely reconvene to hear from them."
Ms Forbes resigned from RTÉ last month, having been suspended by the RTÉ Board a few days previously.
Mr Jennings is ill and currently on sick leave.
Many questions remain over RTÉ financial controversy
Ms Smyth said that the committee has also sought additional information about Toy Show The Musical and the questions surrounding it.
On Ryan Tubridy's return to broadcasting at RTE, she said: "I think RTÉ will have to make its own decisions around that.
"I think what will be really critical for Mr Tubridy, and he said it himself at our committee hearings, is the openness and transparency."
Asked for her view on the answers of Noel Kelly that he was acting on instructions from RTÉ regarding invoicing, she said:
"I asked the very question myself of Mr Kelly that after 23 years of walking down the corridors of RTÉ, representing many of the stars here within the organisation, that to be asked something completely out of the blue, no precedence for it whatsoever.
"I don't find it credible that on this one occasion instructions would be given that were quite bizarre in terms of using a different account than he’d used himself, using a barter account that he wasn't familiar using," she said.
