Season 4 aired between 30 Sep 1991 and 24 Feb 1992, 13 episodes.
Episodes
E01
LBJ (1)
30 Sep 1991
E02
LBJ (2)
30 Sep 1991
E03
The Massachusetts 54th Colored Infantry
07 Oct 1991
E04
Scandalous Mayor
28 Oct 1991
E05
The Johnstown Flood
04 Nov 1991
E06
Pearl Harbor: Surprise and Remembrance
11 Nov 1991
E07
G-Men: The Rise of J. Edgar Hoover
24 Feb 1992
E08
Duke Ellington: Reminiscing in Tempo
09 Dec 1991
E09
The Quiz Show Scandal
06 Jan 1992
E10
Love in the Cold War
13 Jan 1992
E11
Wild by Law
10 Feb 1992
E12
Barnum's Big Top
14 Oct 1991
E13
In the White Man's Image
17 Feb 1992