FILM & REVIEW Cracking little Cold War espionage/noir hybrid. Someone is stealing atomic secrets from a US lab in LA and passing them to a Communist cell. The stolen formula is hidden in a painting that is then shipped to London and onto Moscow. Only a handful of scientists know the formula but which one is it and how is the transfer done. FBI agent O’Hara (O’Keefe) is assisted by Scotland Yard detective Grayson (Hayward) are on the case but are at first baffled as to how the top security is being evaded. Various suspects are identified but they all end-up dead to cover the real traitors tracks… It’s very cleverly done with great use of San Francisco locations with car chases and shootouts along the way - plus a splendid Raymond Burr as a goatee bearded heavy. It makes great use of available science with hidden camera’s , UV lights , and all manner of lab based forensics The only minor grumble is overuse of the sonorous noir voice over which gets annoying after a while but overall very good…4/5