Don is asked to be the best man at his old school friend's wedding.

Samantha's singer-songwriter boyfriend Jackson invites Don to play at his open mic night.

Don starts dating an older woman but can't handle the grown-up world she lives in.

With Abby gone for six months, Don wants a stripper to move into the spare room.

Don thinks he might be a bit gay after Samantha's brother gets into bed with him.

Don joins a gym, but fails to get beyond the running machine without passing out.