Measure 81 to the end

After another long episode (measures 81 to 106) the bass and the tenor present the subject in what may appear as a stretto (the bass a quarter note after the tenor). In measure 111 the subject goes to the soprano and alto in a similar way:

If we change the rhythm we notice that in fact the bass is doubled by the tenor in thirds:

The process is inverted (now sixths instead of thirds) in the case of the soprano and alto:

Bach allows parallels fifths between bass (Bb - D) and tenor (F - A):

And octaves (C - E) between soprano and alto:

After a long episode the fugue ends with the presentation of the subject by the tenor and alto. The tenor uses the modified form in G minor. The alto the original form in D minor: