Trip begs Bree to tell him what really happened the night of Alejandro's murder as her trial begins to go south and it looks like she's about to be convicted; Gaby tries to come up with a solution that will take the burden off of Bree; Susan tries to keep the sale of her house private until she's had a chance to break the news to the ladies; Katherine Mayfair (Dana Delany) returns to Wisteria Lane and offers Lynette an intriguing job opportunity - which could end her chances of reconciling with Tom; the women all agree to take care of Mrs. McCluskey when they discover that she wants to die with dignity at home; Susan finds herself at wits end when Julie goes into labor at the most inopportune time; and Renee is shocked to discover that, as their wedding nears, Ben has been arrested and thrown in jail