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| Alexander Isaacs | |
| Aliases: | Alex Isaacs Alexander R. Isaacs Alexander Roland Isaacs Doctor Alexander Isaacs |
| Continuity: | Resident Evil |
| Notability: | Antagonist |
| Type: | Scientist |
| Occupation: | Businessman |
| Gender: | Male |
| Race: | Clone |
| Location: | Raccoon City |
| Status: | Deceased |
| Died: | 2012 |
| First: | Resident Evil: Apocalypse |
| Final: | Resident Evil: The Final Chapter |
| Actor: | Iain Glen |
Doctor Alexander Roland Isaacs is a fictional businessman and scientist and a recurring antagonist featured in the Resident Evil film series. Played by actor Iain Glen, he first appeared in the 2004 film Resident Evil: Apocalypse. He also appeared in Resident Evil: Extinction and Resident Evil: The Final Chapter.