I had a little trouble at the beginning comprehending who was who and what was happening but I seemed to catch on before much of the program went by. Still, parts of this did not make sense to me. I'm sure it would be in clearer focus if I listened again.

A scientist's wife has recently died. She visits him in ghost form within weeks of her death and delivers a warning.

Meanwhile, this same man is to attend a local conference featuring scientists from around the world.

One of them is a friend of his from an East Bloc country that has somehow communicated to him a desire to defect.

The scientist has been recruited to ensure that the defection goes smoothly.

This episode is not without twists and turns. 