spies

agent detective informer investigator mole operative secret agent secret service undercover agent

emissary lookout observer patrol picket plant scout sleeper sleuth snoop spook spotter watcher

double agent espionage agent foreign agent inside agent intelligencer

discover examine scrutinize snoop

case eyeball glimpse meddle notice observe peep pry reconnoiter scout search shadow sleuth spot stag tail trail view watch

catch sight of fish out get a load of keep under surveillance look for recon set eyes on stake out take in take note

ignore miss neglect overlook