Of the dancers and dance troupes spanning all TOTP, Ruth Pearson and Sue Menhenick made most appearances. As many shows were wiped it's unclear which made most appearances. But between them they would have appeared in more episodes than any other artists or performers. Sue also was a member of all versions of the troupes from 1974 to their demise in 1981.
After the final closing credits in the last ever show, Jimmy Saville is seen entering the empty studio and switches out the lights for the last time.