John Patrick "Jack" Ryan, Sr. is a fictional character created by Tom Clancy who appears in many of his novels and their respective film adaptations.

I returned from a run Wednesday morning to learn that author Tom Clancy ... that Clancy gave him on his officer’s belt. The novel he was researching, “Clear and Present Danger,” was released ...

The streamer is adding the Tom Clancy thrillers Patriot Games and Clear and Present Danger to their service, starting today. Following the success of the first Clancy Hollywood adaptation ...