Call Me Fitz (2010) : 1x11

A sniper takes siege of Fitzpatrick Motors. Larry is convinced Fitz's cowardice in withholding his syphilis diagnosis from his sexual partners has brought this upon them. But as Fitz points out, it could be any one of the hundreds of people who want him dead. Ali meanwhile tries to get over bad boy Fitz by dating milquetoast Chester Vince. As the Fitz Motors team narrows down the possible shooter, Josh concludes its Kara. They call Ali to negotiate with the suspect. But the real hero turns out to be Chester, who makes sure Kara isn't tried as an adult. Larry urges Fitz to disclose his STD to Ali. But in outing their relationship to Chester, he ruins Ali's chance of happiness with a good guy once and for all...