Printed in Valiant, March 13-20, 1976 with 6 black & white pages. Reprinted in Vulcan, Dec 9-16 1978, in issues #79-#80 of the 2nd Eagle series, Sept. 24-Oct. 1, 1983, then in a graphic novel called One-Eyed Jack in 2017.
[COP] Someone is killing people in New York City. McBane is on the case and finds puzzle pieces. Will he solve the murders and catch the killer?