Paul,
There were various interviews with survivors over the years.
The well-known one featuring Lightoller (1930s?)was an interview with him only, I believe, not a round table setting, but others here who are experts on the officers will know for sure.
Both Rene Harris and Edith Russell were interviewed on radio a number of times. Rene appeared on NBC Radio's "Mary Margaret McBride Show" in 1942 and in another series of programs in the late 40s. She was definitely never on the radio show hosted by Walter Winchell, with whom she had a long-standing feud. She didn't always talk about Titanic in these shows, by the way, but, after the book and movie of "A Night to Remember" came out, she was naturally in demand to discuss the subject. She appeared on several TV variety shows, as well, making a special guest appearance on "The Merv Griffin Show" in 1967.
I am sure these episodes survive but one would have to address the relevant archives and commission a search. One can possibly obtain a transcript if not an audio or video recording of the broadcasts.
Edith Russell was interviewed on radio both in the US (at the time of the 1953 movie) and in London on the BBC (many times in the 1960s and early 70s).
Her friend - and sometimes adversary - Lady Lawford, the somewhat eccentric (if not downright crazy) mother of actor Peter Lawford, said this about Edith's frequent Titanic talks:
"...Every year they interview her on BBC. You'd think she was the only person on board the Titanic. Sometimes I wish she had gone under with it..."
She also appeared on BBC-TV and on other television programs in America and Germany.
A 1970 BBC interview with Edith can be found and heard online at
http://www.bbc.co.uk/dna/place-nireland/A731071
Her 1962 appearance on German TV is available on video. I forget the name of the film distributor. Maybe someone else knows. She appeared on that show with another survivor, Alfred Nourney.
Randy