The Rings of Ikiria

The Rings of Ikiria is a Big Finish Productions audiobook based on the long-running British science fiction television series "Doctor Who". The Companion Chronicles "talking books" are each narrated by one of the Doctor's companions and feature a second, guest-star voice along with music and sound effects.
Plot.
An investigation into crop circles leads the Third Doctor, the Brigadier and UNIT into an encounter with a beautiful alien gifting golden rings. As UNIT and even the Doctor are put under her spell, Mike Yates finds himself an outcast amogst his closest allies, and the only hope for mankind against its latest threat.
Critical reception.
"Doctor Who Magazine" reviewer Matt Michael found the play to be an excellent examination of the character of Mike Yates.