Jeff Bosley

Another team is ambushed and must be replaced urgently; Jason and the team are immediately deployed and must leave their families; Clay and Stella weigh up his proposal of marriage; Jason and Alana must make an important decision.

Captain Holt and Jake contract the mumps during an investigation and decide to be quarantined together. Rosa tries to help Boyle mourn, and Terry cleans up Hitchcock and Scully's mess.