A car executive seeks a new design from Titus, who turns to Ken for inspiration when he has a creative block.
Titus starts street racing for cash, fueling fury in Erin, who nursed him back from his last racing injury.
Erin's surprise birthday party for niece Amy is an eye-opener for Erin when she sees the squalor in which the girl lives.
Titus is determined to mend fences after Tommy rejects his father, who's just revealed he's gay.
Titus's sister Shannon, who's outshone him at every turn, does so again at the reopening of his shop.
Erin disdains, then requests Titus's help when she visits troubled teens for her first grad-school assignment as a interning social worker.
Christmas on a houseboat brings a kinder, gentler Ken when he thinks his best friend has fallen overboard.
Titus tries to keep Ken from testifying as his mother goes on trial for murdering her last husband at Titus's wedding.
Phyllis Diller plays Grandma Titus, who still intimidates Ken despite her Alzheimer's, which has her trying to teach a high-school class.
Suicidal over a broken romance, Amy listens to Titus as he tries to talk her out of it with tales of his own youth—which don't make that great a case.
Titus is firmly opposed to romance between his sister Shannon and Tommy, neither of whom is listening to him.
Tired of carrying Dave, Titus decides it's finally time he learns to fend for himself--when they're both stranded on an icy cliff.
En route to Vegas for Titus's bachelor party, the boys encounter a woman in labor, delaying Titus's call to Erin, who imagines the worst.
Titus weighs whether to be a concerned son or a passive buddy to Ken, who tells his buddy to ignore the heart-attack signs he's experiencing.
As part of Erin's therapist training, the Titus clan participates in a family session, where issues of trust surface between Titus and Erin.
A cannon is key to Titus's plan for vengeance on Erin--on her birthday, no less--for her role in his humiliating therapy session.
A softer side of Ken emerges as he courts a new woman, who happens to be Tommy's mother.
Titus's schizophrenic mother visits as he and Erin are scrutinized by a social worker regarding their care of Erin's niece.
Following his personal loss, Titus disdains grief, until an olfactory memory triggers an emotional flood while flying home.
Removed from the plane by the FBI, the unhappy quintet undergoes interrogation, including questions about Titus's sanity.
Titus aims to throw a scare into a boy who's been insulting Amy and nearly gets himself thrown in jail, but for the intervention of Erin--and the offender's father.
