'Corners of the Mind' by Andy Lane

Avon is trapped in a labyrinth full of puzzles, with no way to teleport to safety and deadly traps at every corner. He needs all his wits to survive, but there is one problem - he is losing his mind with every puzzle, piece by piece, memory by memory.

Paul Darrow (Avon), Jan Chappell (Cally)

Directed by Ken Bentley

Notes:
*Featuring Kerr Avon and Cally

*A Big Finish Audio Production