“CSI” — Seventh Season

The seventh season of “CSI: Crime Scene Investigation” is as solid as any of the series’ previous years. The stories are strong, the actors share potent chemistry, and the characters are believable because they are flawed human beings. This year, “CSI” delves into the complicated romance between head investigator Gil Grissom (William Petersen) and his underling Sara Sidle (Jorga Fox). The two are reticent to let their colleagues in on their relationship, and the season finale offers a gasp-inducing prospect of their future together.

“CSI: Crime Scene Investigation” — Season 6

A perennial Nielsen ratings topper, CSI: Crime Scene Investigation shows no signs of losing creative momentum in its sixth season. The 24 episodes are taut, fascinating, and gruesome. That killer combination fulfills the promise this CBS series has shown since its inception. In its sixth year, the show delves into the characters’ personal lives more so than in previous seasons, adding more dimension and truth to the roles. We see the looks exchanged between head investigator Gil Grissom (William Petersen) and his underling Sara Sidle (Jorja Fox) and learn the true nature of their relationship.