#1

Jul 1st, 1970

1st Appearance of Underdog

#2

Sep 1st, 1970

#3

Nov 1st, 1970

#4

Jan 1st, 1971

#5

Mar 1st, 1971

#6

May 1st, 1971

#7

Jul 1st, 1971

#8

Sep 1st, 1971

#9

Nov 1st, 1971

#10

Jan 1st, 1972