'Deadly Reunion', written by Terrance Dicks and Barry Letts, features the Third Doctor and Jo.
Back Cover Blurb
With one glance he will destroy your body and wither your soul.
Second-Lieutenant Lethbridge-Stewart gets more than he bargained for when he is assigned to check the mapping of Greek Islands at the end of the Second World War. Even if he lives to tell the tale, will he remember it?
Years later, Brigadier Lethbridge-Stewart and his colleagues at UNIT investigate a spate of unexplained deaths and murders. Meanwhile, the Third Doctor nd Jo are caught up in strange events in the small English village of Hob's Haven.
As preparations get under way for a massive pop concert, a sinister cult prepares for a day of reckoning - business as usual for UNIT. But can the Brigadier help prevent the end of civilisation? His friends and colleagues are not so sure, because this time, the Brigadier has fallen in love…