Of Chaos Time The was a 2014 Big Finish Productions full-cast audio short story featuring the Sixth Doctor and Peri Brown, released as part of the Breaking Bubbles and Other Stories anthology.
Publisher's summary
Cast adrift in his own chronology, the Doctor must avert the consequences of a catastrophic experiment in using time as a weapon of war.
Plot
to be added
Cast
References
to be added
Continuity
to be added