Visible crew/equipment: As Peter enters Matt's apartment and begins rummaging through the dresser drawers, the shadow of the boom is quite visible on the adjacent wall, and then the tip of a boom drops twice.
Better Homes and Condos - S5-E17
Visible crew/equipment: As Peter is consulting with Michael in Michael's recovery room, shadows from the boom mic are visible at the top of the privacy curtain.
Visible crew/equipment: As Peter is talking with Amanda inside the prison conference room there are shadows on the ceiling to indicate it is nighttime. You can just make out a boom camera moving a bit, followed by brief banging and a clank, disguised as prison cell doors that would be nowhere near the visitor conference room. Then as Peter moves to the center of the wall and then sits down beside Amanda, shadows from the overhead boom equipment are moving within the ceiling shadows.
Visible crew/equipment: After Jane's birth mother invites Jane to sit and talk over tea, Jane crosses to a chair while the mother sits and begins pouring. As Jane gets comfy, the sleeve of a camera person or assistant can be seen for 2 seconds as the camera moves slightly around the back of Jane's chair.
Who's Afraid of Amanda Woodward?: Part 1 - S5-E32
Continuity mistake: As Chelsea is leaving her mom's hotel room through an adjoining doorway to her own room, she pulls the door closed behind her. She walks over to sit on her bed but the door she just closed is wide open, allowing her mom's suitor to walk through without touching the same door. (00:19:25)
Deliberate mistake: The judge grants wheelchair bound Hilda Mars a million dollar settlement for her injuries. Then Sydney confronts her outside and wrestles her up out of the chair in which Hilda fakes a tumble down the steps. That night Hilda's attorney visits Sydney and admits he knows Hilda is a con who got away it instead of calling it out to the judge.
From Here to Maternity - S5-E24
Revealing mistake: After Michael shows up at Kimberley's place then visits her bedside to be informed that she's very sick, the nurse asks him about any next of kin he can call, and he picks up the phone and immediately dials then says "Hello, Mrs. Shaw?" when he's never once called Kimberley's mother.
Screams from a Marriage - S5-E22
Revealing mistake: Kyle is busy setting boxes of Taylor's things outside as Sydney walks up and asks what's going on. He tells her he and Taylor are separated. Then he sets out a couple of suitcases and Taylor shows up. They get into it in the doorway just as Taylor yells "Go to hell" before picking up the suitcases and suddenly the boxes are nowhere to be seen.