Barnabas, Quentin and the Crystal Coffin (July 1970)

Heiress Betty Ward is worried about her twin sister, who has eloped with Jeremy Frene. She follows them from Paris to Frene estate at Collinwood—but arrives too late!

Her twin is dead, victim of a mysterious illness. Her body has been sealed in a crystal coffin and kept in a darkened room. Jeremy swears that because her ghost returns to the castle each night, he refuses to bury the coffin.

Betty is convinced her sister's death was not a natural one. Jeremy's aunt opposed the marriage. Her ally against the couple seems to have been Quentin Collins, a suspected werewolf.

Betty turns to Barnabas Collins for help, despite the rumors that he is a vampire. But she does not realize that by doing so, she has placed herself in mortal danger…
This story is an homage to Edgar Allan Poe's 1844 short story, The Premature Burial, a text also used in the television series for inspiration.

Barnabas, Quentin and the Witch's Curse (August 1970)

Against her will, Anita Burgess accompanies her brother Jeffrey to Collinwood. He is determined to get revenge against Quentin Collins who he believes is responsible for his best friend's death.

Pretending friendship toward Quentin, Anita and Jeffrey learn he has established a Black Magic center at Collinwood and has several young women completely under his power.

Jeffrey enlists Barnabas's aid in his struggle to destroy Quentin—both to avenge his friend's death and to free the young women. But does he not realize that by destroying Quentin, he risks destroying Anita as well.

Barnabas, Quentin and The Haunted Cave (September 1970)

Harriet Turnbridge asks Barnabas Collins for help after her husband, her brother-in-law, and father-in-law are found dead, their throats savagely ripped open.

The police insist the killer is a mad beast. Harriet thinks that the phantom recently seen at Collinwood is responsible. Barnabas suspects that Quentin Collins, disguised as a wealthy hippie, is guilty.

Where will they find the murderer? In the nightmare world of Harriet's dreams? In the haunted cave beneath the Collins' family cemetery? Or in another century—when witchcraft and demonology threatened Collinwood?