Long before he became producer/director of The Tonight Show, Fred DeCordova helmed the Universal meller Illegal Entry. Howard Duff, who later worked with DeCordova on the TV series Mr. Adams and Eve, stars as Bert Powers, an undercover agent for the U.S. Department of Immigration. While attempting to bring a vicious gang of alien smugglers to justice, Powers falls in love with Anna Duvak (Marta Toren), a gang member who is Not What She Seems.
| Actor | Role |
|---|---|
 Howard DuffBert Powers | Bert Powers |
 Märta TorénAnna Duvak O'Neill | Anna Duvak O'Neill |
 George BrentChief Agent Dan Collins | Chief Agent Dan Collins |
| GGar MooreLee Sloan | Lee Sloan |
 Tom TullyNick Gruber | Nick Gruber |
 Paul StewartZack Richards | Zack Richards |
 Richard RoberDutch Lempo | Dutch Lempo |
 Joseph VitaleJoe Bottsy | Joe Bottsy |
 James NolanAgent Benson | Agent Benson |
 Clifton YoungBilly Rafferty | Billy Rafferty |
 David ClarkeCarl | Carl |
 Robert OsterlohAgent Crowthers | Agent Crowthers |
 Anthony CarusoTeague | Teague |
 Donna MartellMaria | Maria |