Hop Harrigan (also known as The Guardian Angel and Black Lamp) first appeared in All American Comics #1 created by Jon Blummer (Fighting Yank, Little Boy Blue) as one of the first successful aviation heroes in comic history (Hop appeared after Tailspin Tommy, Barney Baxter, Connie Kurridge and others). Hop Harrigan was technically not a true superhero (as he had no costume or special powers) though he did meet the Justice Society of America in All American Comics #8, and he did eventually become a superhero from All American Comics #25 (April 1941) to #28 (July) as the costumed Guardian Angel.
On radio, Hop Harrigan aired from August 31, 1942 to February 6, 1948. The series began on the ABC Blue network and moved October 2, 1946, to the Mutual Broadcasting System. Charles Stratton appeared in the title role with Ken Lynch as Tank. Lynch was later replaced by Jackson Beck, voice actor for Bluto (Popeye), King Leonardo and Perry White (Superman). Mitzi Gould played Hop's girlfriend, Gail Nolan. One of the writers for this series was noir novelist David Goodis.
Hop Harrigan as well as other comic series from All-American Comics were purchased by DC Comics, a publisher that had close relations to All-American Publications ever since it debuted. DC Comics continued to publish the Hop comics in All-American Comics until the 99th issue in July 1948, when the aviation adventure genre was abandoned in favor of a Western theme and Harrigan was replaced with Johnny Thunder. In the end, Hop Harrigan became mostly forgotten by the majority of comic book fans, though other All-American characters including The Flash, Green Lantern and Wonder Woman would remain popular for years to come. The opening to the radio serial was as follows:
"CX4 to Control.....CX4 to Control......This is Hop Harrigan....coming in" to the roar of a prop fighter plane. From the control tower: "Control Tower to CX4: Wind southeast. Ceiling 1200. All clear." (Source: wikipedia.org)