Reilly, Ace of Spies is a 1983 television miniseries that is based on the 1967 book Ace of Spies by Robin Bruce Lockhart.

The 12 part series stars Sam Neill as Sidney Reilly, an adventurer and secret agent who was employed by Scotland Yard and later the Secret Intelligence Service.

Today, many historians consider Reilly to be the first 20th century super-spy but, because he was a master of deception, much of what is known about him could actually be false.