S2, EP17 "The Promise"
When the body of a young girl who was killed over 40 years ago is discovered at the bottom of Lake Mead, Max Roby promises her mother that the CSI team will finally find justice for her daughter.
S2, EP16 "We All Fall Down"
Medical examiner Sonya's life is in jeopardy when she is exposed to a mysterious poison as the CSI team races to find the antidote; Max's ex-husband, Daniel, returns to make sure that she and their son are safe.
S2, EP15 "Ashes, Ashes"
A silver ink note threatening Maxine Roby's life is found at the crime lab, sending the entire CSI team to crack who is behind the notes and how they connect to other murder cases.
S2, EP14 "Third Time's the Charm"
The team investigates the mysterious death of a competitive eating contestant; Chavez partners with Allie to prove where the mysterious silver ink notes have been coming from.
S2, EP13 "Boned"
The CSI team investigates the death of an archaeologist found near the breakthrough discovery of an ancient civilization; Max locates another cryptic note written in familiar silver ink after a mentally distressed woman kills her attacker.
S2, EP11 "Trinket"
When a young, non-verbal boy is found hiding in a stranger's garage, the CSI team searches for his missing mother; Max receives a strange letter with symbols in silver ink that Folsom and Allie recognize from prior crime scenes.
S2, EP10 "Eyeballs"
A social media influencer party ends with the brutal murder of a popular guest; Chris Park's side hustle makes him uniquely qualified to lead the CSI team in their investigation.
S2, EP9 "In the White Room"
When the bodies of two Regency Romantic Festival attendees are discovered, the CSI team uncovers a shocking link between their murders and previous cases.
S2, EP8 "Grace Note"
Catherine's frustration intensifies when a lead suspect in Grace's disappearance is found murdered; the team exhausts all their skills to figure out who killed the suspect, and if his death will lead them to Grace.
S2, EP7 "Burned"
A mysterious bigfoot-like footprint found near a crime scene puzzles the CSI team as they work to uncover who -- or what -- killed a father and son.
S2, EP6 "There's the Rub"
Max leads her team to investigate the death of a prestigious Michelin-starred chef found hanging in his restaurant's walk-in freezer.
S2, EP5 "In Harm's Way"
After all the guests attending an upscale fundraising soiree for the science department at a local university fall ill, the CSI team gears up to investigate; Catherine enlists Grace's roommate to help her find clues after Grace disappears.
S2, EP4 "Koala"
When three masked assailants invade a home and murder an entire family, the team is called to the scene to investigate; Catherine leads the team through the emotional case, which intensifies her own longing to reconnect with her estranged daughter.
S2, EP3 "Story of a Gun"
The team investigates after a group of teens discover a dead woman behind the wheel of an abandoned car in a Nevada ghost town.
S2, EP2 "The Painted Man"
The CSIs investigate when a creepy mannequin prop inside a popular haunted house turns out to be a real dead body; Catherine enlists the help of Folsom to search for her friend who disappeared.
S2, EP1 "She's Gone"
Catherine Willows persuades Maxine Roby to let her rejoin the team; a dominatrix is found murdered near her secret sex dungeon.