Audio problem: 1897: Quentin challenges Barnabas by pulling a decorative sword from a wall display and pointing it at his throat. Unfortunately, the display wasn't all that well attached to the set wall. Though the camera pans away, you can hear a loud clunk as the piece falls, followed by the loud crash of shattering glass as it strikes and breaks a table lamp. You can also see the actors struggling very hard to keep straight faces as they continue with their lines.

Revealing: When "Dark Shadows" did its version of "Dr. Jekyll & Mr. Hyde," the Hyde character, John Yaeger, had prosthetic nose trouble during a fight scene. His rubber schnoz came unglued and nearly fell off. He was subsequently given a nose job.

Revealing: 1967: The apparently miscued Burke enters the foyer set through a door and starts across the stair landing. You can then hear the director say, "Try it again," and he turns, goes back out the door and comes in again.

Other: 1968: The now-vampire Angelique kneels beside Barnabas' chair to tell him he belongs to her now. When she tries to get up, her long white gown catches on something, causing her to muff her next line a bit as she gives the fabric an annoyed tug to free it.

Other: 1967: A persistent fly insists on clinging to Barnabas' forehead as he plots to kill Dr. Hoffman. He tries to ignore it, tries walking briefly out of camera range, then comes back and tries shooing it away on camera, but it keeps coming right back.

Revealing: 1968: When the psychic enters Quentin's haunted room, she stumbles over the wire used to "ghostly" open the door, and has to grab onto the gramophone table to keep from falling. The table almost falls over with her, but she manages to stay upright, barely.

Other: 1795: Reverend Trask is attempting to perform an exorcism when a (demonic?) fly aims straight for his mouth. He has to interrupt his incantation long enough to blow it away.

Other: 1967: Burke mangles his line to Vicky, and instead of telling her to get off her history kick, says, "I just think you should get off that hickory stick for a while."

Revealing: 1966: Elizabeth is thwarted by a set door that refuses to open when she tries to make her exit. She struggles with it, tugging several times, but winds up just standing there, exasperated, until the scene ends a few merciful seconds later.

Other: 1970: Barnabas fends off a werewolf by striking at it with his silver-headed cane. Unfortunately, the cane bounces off the resilient werewolf and hits Barnabas in the head. (Jonathan Frid reportedly had to have a few stitches afterwards.)

Continuity: 1967: Barnabas selects a treasure from a jewelry chest while bad guy Jason spies on him through a window. Willie is supposed to put the chest away, but when Jason later breaks in to steal it, the chest is still sitting on the table in plain view, so Jason has to pretend not to notice it. The break-in scene is recapped the next day, only this time, the chest is no longer on the table.

Visible crew/equipment: 1795: Angelique throws open a set of double doors to find Jeremiah's ghost in the hall. She cries out and steps back, and to the right of the screen, you can see a crew member's hand enter the shot to pull one of the doors open further.

Revealing: 1967: Barnabas and Vicky are talking in Collinwood's foyer when a great deal of noise starts interrupting the scene from backstage. You can hear coughing, several bumps and crashes, shouts, and finally, a fire extinguisher going off. Meanwhile, the distracted actors are completely blowing all their lines - but the unstoppable taping goes on.

Other: "Dark Shadows" was taped live and broadcast within hours of its recording, so there was seldom ever time to do retakes. Consequently, hundreds of goofs ended up on the air. Perhaps the funniest of them all occurred in a scene inside the Collins mausoleum, where the late Louis Edmonds was supposed to say, "Some of my ancestors are buried here." What came out was "Some of my incestors are buried here." To his credit, Edmonds not only kept his cool, but laughed and corrected the mistake in character.

Revealing: 1967: Roger is late for a meeting because actor Louis Edmonds, forgetting he had another scene, had gone to his dressing room and undressed. Because it's "live tape," the other actors must awkwardly ad lib until Edmonds can throw on a shirt and be hustled onto the set, whereupon one camera zooms in tight on him and stays there. You can hear the stress in the other actors' voices as they stifle laughter. They're trying to play an oh-so-serious scene with an actor wearing a shirt, a tie, and boxer shorts.

Revealing: 1968: A shot of Barnabas and Julia taken through the small window in the cellar door apparently obscured Jonathan Frid's view of the all-important red light. Obviously thinking himself off-camera, Frid took a moment to clean the inside of one nostril with his index finger.

Revealing: 1967: Dr. Woodward struggles with a stuck zipper on an oxygen tent. When the prop refuses to cooperate, he makes a disgusted sound and adlibs to his companion, "Zip that up, will you, Julia?" Then he hurries out, leaving a bewildered Julia to deal with a supposedly critical patient.

Visible crew/equipment: 1967: During the closing credits, a crew member walks by outside the supposedly-second-story window of Josette's bedroom - twice.

Revealing: 1990s: When Barnabas and Julia time travel into the 1990s, they find Mrs. Johnson's body tied to a tree. While a crazed Carolyn accuses them of killing her, the "corpse" blinks several times.

Revealing: 1967: The dying Dr. Lang fumbles with a reel-to-reel recorder, making a tape that we'll hear over and over again later on. Only he "records" his message with the machine turned off: the reels aren't moving.