From Thriller Picture Library #371, July 1961. Reprinted as Terror Calls The Tune in #9, November 1966.
In return for British financial aide and tanks and ammunition, rebel leader General Arrida was near toppling the dictatorship of the current government in the South American nation of Curacos. But Arrida also had other 'friends' showing his true colors. Proof of his double-dealing is in the hands of an MP back in London who is about to expose him but then learns the General's men have kidnapped the MP's teen son. In an oddly lucky way, the desperate MP finds his way into the coffee-shop beneath John Steel's office and soon Steel is involved.