Stargate Atlantis: Season 3, Episode 13

3 - 13: Irresponsible

Sheppard and his team hear of a great warrior with stories of defeating both the Genii and the wraith and decide to seek him out in hopes of making a powerful new ally. But when they learn this great warrior is none other than Lucius they believe he's up to his old tricks again. Testing him for his enamor-inducing herb they find he's clean and only really guilty of pawning off their battle stories as his own.