Tom Mandrake (born May 26, 1956) is an American comics artist, perhaps best known for his collaborations with writer John Ostrander on several series, including "Grimjack" (from First Comics) and "Firestorm", "The Spectre", and "Martian Manhunter" from DC Comics.
<ref name="John/Tom">John Ostrander and Tom Mandrake collaborations at the Grand Comics Database</ref>
DC Showcase: The Spectre is a 2010 short animated film, directed by Joaquim Dos Santos and written by Steve Niles, Gary Cole played Detective Jim Corrigan, whose suspects are brought to justice by his alter-ego the Spectre.
 The film, which was released on February 23, 2010 as a bonus feature on the "" DVD, was the first of the DC Showcase series and was included on the compilation DVD "DC Showcase Original Shorts Collection" in an extended version.
Dr. Katherine "Kate" Corrigan is a fictional character from the "Hellboy" and "B.P.R.D." comic book series published by Dark Horse Comics and created by Mike Mignola.
 Her appearance is based on Mignola's wife, Christine.
 Within the world of the comics, dubbed the "Mignola-verse", Corrigan acts as B.P.R.D. field leader to "enhanced" agents including Hellboy (before abandoning the Bureau), Abe Sapien, Roger the Homunculus, Liz Sherman and Johann Kraus.
Kiran Comics was an Indian comic line published in the late 1980s by Kiran Publications and distributed by India Book House (IBH).
 Like many other Indian comics of the era, Kiran Comics relied on reprinting popular international characters.
 This was common practise at the height of comics sales in India, and led to the lack of original Indian comics characters until Diamond Comics and Manoj Comics created several popular original characters.
 The rise of Indian characters caused the demise of publications such as Kiran Comics, which only printed international comic strips.
The Spectre is the name given to several fictional superhero characters who have appeared in numerous comic books published by DC Comics.
 The character first appeared in a next-issue ad in "More Fun Comics" #51 (Jan. 1940) and received his first story the following month, #52 (February 1940).
 He was created by Jerry Siegel and Bernard Baily, although several sources attribute creator credit solely to Siegel, limiting Baily to being merely the artist assigned to the feature.
Leading Comics was a comic book published by what is now DC Comics during the 1940s and early 1950s, a period known to fans and historians as the Golden Age of Comic Books.
 At the title's inception, DC was actually two companies, National Comics (later National Periodical Publications) and All-American Publications.
 National and All-American shared some ownership and advertised and co-branded their comics as if they were one company.
 They also collaborated on "All Star Comics", an All-American publication which featured the Justice Society of America, a super hero team including characters from both companies' stables, e.g., The Spectre and Starman from National, The Flash and Green Lantern from All-American.
Jim Corrigan is the name of three fictional characters that have appeared in numerous comic books published by DC Comics.
 The first Corrigan initially appeared in "More Fun Comics" #52 (February 1940), a deceased cop acting as host to the cosmic entity the Spectre, and was created by Jerry Siegel and Bernard Baily.
Bernard Baily (April 5, 1916 – January 19, 1996) was an American comic book artist best known as co-creator of the DC Comics characters the Spectre and Hourman, and a comics publisher, writer, and editor.
"Watchmen" is a twelve-issue comic book limited series created by Alan Moore, Dave Gibbons, and John Higgins, published by DC Comics in 1986 and 1987. "
Watchmen" focuses on six main characters: the Comedian, Doctor Manhattan, the Nite Owl, Ozymandias, Rorschach, and the Silk Spectre.
 These characters were originally based on the Mighty Crusaders and then reworked in an unsolicited proposal to fit superhero properties DC had acquired from Charlton Comics in the early 1980s.
 Series writer Alan Moore created the main characters to present six "radically opposing ways" to perceive the world, and to give readers of the story the privilege of determining which one was most morally comprehensible.
Murphy C. Anderson, Jr. (July 9, 1926 – October 22, 2015) was an American comics artist, known as one of the premier inkers of his era, who worked for companies such as DC Comics for over fifty years, starting in the Golden Age of Comic Books in the 1940s.
 He worked on such characters as Hawkman, Batgirl, Zatanna, the Spectre, and Superman, as well as on the "Buck Rogers" daily syndicated newspaper comic strip.
 Anderson also contributed for many years to "PS", the preventive maintenance comics magazine of the U.S. Army.

Question: Jim Corrigan and The Spectre are both characters in what companies comics?
Answer: DC Comics