Science of deduction FOA 5

Hello. So i planted the Russian device and did not get out in time big bang, end credits roll(Game over??) And i wake up still to have the mission to do but the tunnel has caved in, but find a tape cassette. Now i am stuck??? Also i completed these missions in another persons game. Any hep would be much appreciated thanks.

3 posts were merged into an existing topic: Unable to complete Main mission Science of Deduction