- "This is the definition of efficiency. Making every second count."
"Ticker" is the nineteenth episode of the second season of Scorpion, and the forty first of the series overall. It aired March 14, 2016.
When Los Angeles' blood supply is hacked and deemed unusable because of fear it's been tainted, Team Scorpion must find the culprit in order to save a young girl in desperate need of a heart transplant.
- Elyes Gabel as Walter O'Brien
- Katharine McPhee as Paige Dineen
- Robert Patrick as Cabe Gallo
- Eddie Kaye Thomas as Toby Curtis
- Jadyn Wong as Happy Quinn
- Ari Stidham as Sylvester Dodd