In the next episode of "Scorpion" season 4, Walter O'Brien (Elyes Gabel) and his team try to save a dog that is stuck in a cistern while they wait for the verdict of Agent Cabe Gallo's (Robert Patrick) trial.

The synopsis and promotional photos of the upcoming installment titled "Who Let the Dog Out ('Cause Now It's Stuck in a Cistern)" were just released and they show O'Brien with his girlfriend Paige Dineen (Katharine McPhee), Happy Quinn (Jadyn Wong) and Toby Curtis (Eddie Kaye Thomas) standing around a sewage hole at the beach.

Apparently, a wayward dog accidentally fell through it and got stuck. It seems that no matter how big or small the task, Team Scorpion will heed the call and do whatever it takes to complete the mission.

In the photos, O'Brien is seen holding a white bucket with a string attached to it. It appears that he's going down the hole to get the dog. The chemist Florence (Tina Majorino) is there to help them out as well. She hands a liquid solution to Curtis who does something with it to the white bucket. It is likely that they are going to use the liquid to help the dog slip out from where it is stuck.

In the meantime, they all are waiting for the decision on the case regarding their colleague Gallo. It remains to be seen if they will be able to save the dog and if Gallo will be acquitted.

During the last episode, the Scorpion crew was able to capture a father-daughter team of crooks who stole a bag of money from some drug dealers. They trapped the dad in a car as they arrested the daughter who tried to help him.

"Scorpion" season 4 episode 11 will air on Monday, Dec. 11 at 10 p.m. EST on CBS.