Picture one shows a male flower, not a seed.
You have to watch this plant carefully, it may be a hermaphrodite, thereby risking pollinating the other plants and ending up with seeds everywhere.
Seeds from hermaphrodite plants will be nearly all hermaphrodites themselves, due to the genetic dominance of the hermaphrodite genes.
The seeds will not be fems, but regular hermies, so no good for anything really.
Sometimes a plant will produce a very limited number of male flowers (1-6) and they are easy to remove as they appear, other times you will get a full blown hermie that produces 100s of male flowers, in which case the only safe thing to do is to place it in the garbage.
Picture 2,3 and 4 don't show anything notable.
Hope this helps, Organoman.