When a 19-year-old gunman moves to rape a teenage girl, Delko opens fire, killing him.Two other bank robbers see him and start shooting with automatic Tec9's before fleeing.Also she told him that his biological father was a terrible man, and wanted to shield Eric from him by hiding his identity with the forged papers.
In this same episode, Eric meets Calleigh and hits on her by saying "Are you going to give me your number now or later?
Despite the trauma of the incident, he insists on working the scene with the rest of his team. In "Shattered", Delko's job is endangered when he is arrested for drug possession, but it is discovered that the marijuana was for his sister Marisol to ease the pain of her leukemia treatments.
Later on the Connie, dies and visits her in the morgue to pay his respects. Eric is taken hostage with others at a bank when a group of armed teenagers show up to rob it (episode 409, "Urban Hellraisers").
He is fluent in Spanish, and at least proficient in Russian Delko often acts as a diver for the CSI team, likely due to his muscular physical shape, and has tried to get Ryan Wolfe to train as a diver on several occasions.
Eric also seems to have a knack for being charming, as is evidenced by him having many experiences with ladies, thus him being a "ladies man." Eric's father, Pavel Delektorsky, was a Russian national who had been assigned to Havana during the 1960s, married a Cuban woman, with whom he had three daughters.
He is also shown to be very protective of women, despite being a bit of a 'player', especially if they are being abused or in an abusive relationship (episode 513, "Throwing Heat").