They're continuing to run the $3 Six-Inch Select deal and for this month, it's the Black Forest Ham & Cheese sub (i.e. the Black Forest Ham sub). It comes with Black Forest Ham plus the standard choice of bread, cheese, veggies, and condiments.
They basically seem to be doing a rotations of former regular $5 Footlongs.
Both specials are available at participating Subway locations throughout the month of October.