This issue opens 10 days after the end of "Secondary Objectives" Part 3 and Astin has rejoined Mary and Dudley, having communicated via the personal ads of international newspapers. 

Page 1 reveals that the trio had tracked down Sarah Connor's shack way out in the hills of Mexico. She was gone, leaving behind only booby traps and a note.

In the panel scan above, doesn't it seem unlikely that Mary, warrior-woman from the apocalyptic future, would have long, pretty fingernails? I guess she decided to spend some of her downtime in lazy 1984 getting a manicure and false nails!

On page 3, we learn that after defeating C890.L at the end of "Secondary Objectives" Part 3, Dudley was able to temporarily reprogram it to terminate Z000.M when she arrived in the city looking for them.

A number of civilians and police get a pretty good luck at a mobile, destructive T-800 endoskeleton in Mexico City.