DC · April, 1961
1st appearance of Bat-Giirl (Betty Kane); 1st appearance of Bat-Girl (Bette Kane); 1st Appearance of Bat-Girl (Bette Kane); 1st Appearance of Bat-Girl (Betty Kane); 1st appearance of Bat-Girl (Betty Kane); 1st Appearance of Batgirl (Golden Age); 1st appearance of Blue Bowman (formerly Signalman); 1st Appearance of Blue Bowman (formerly Signalman); 1st appearance of Blue Bowman (Philip Cobb); Origin of Bat-Girl (Bette Kane); Origin of Bat-Girl (Betty Kane)
The Blue Bowman; The Island of 1,000 Traps; Bat-Girl!
Writer: Bill Finger
Artists: Sheldon Moldoff, Charles Paris