Line and column chart: do NOT connect line points?

[OneWithQuestion]

Is there anyway to format a line chart or rather a combo line chart so that the lines themselves are not shown just the dots?

See how some are independent dots and others are connected.

It just looks REALLY odd since some of those do not have any datapoints shown in red.  It would be better to be able to choose a single dot with no join lines, and in a perfect world even pick a shape like triangle, circle, square, etc....