Answer: Marty
Marty is the one who introduces Doug the first time they meet in the episode "Christopher". We see Doug a few times or Marty just speaks to him on the phone.
From Quiz: "Sopranos" Mixed Season 3
Answer: Bevi
We find this out only when we see everyone on the steps after the funeral.
From Quiz: "Sopranos" Mixed Seasons 2
Answer: Danny
We find this out when Tracee tells Tony she is pregnant with Ralphie's baby. Tony responds with "I don't get involved with affairs of the heart".
From Quiz: "Sopranos" Mixed Seasons
Answer: Jason and Justin
Jason and Justin Blundetto were twins played by Dennis and Kevin Aloia. They were conceived when Tony B. had his "sample" smuggled out of prison and to his (future ex) wife. The incident was loosely based on a true story that took place in 1996 at a Brooklyn jail; the wife who was supposed to receive the sample decided against it and ratted out her husband, and the guard who provided the service was fired and charged with smuggling.
From Quiz: "Tony Uncle Al" Blundetto
Answer: Charmaine Bucco
Charmaine told Carmela that she and Tony got together one summer while Carmela was out of town before the two were married, hinting that she'd had her chance with Tony and later chose a more honest man, Artie. Later in the series, during Carmela and Tony's separation, Tony considered asking Charmaine, also separated at the time, out, praising her cooking especially. But Tony and Carmela reunited before that could happen.
From Quiz: "The Sopranos" Character Quiz: Carmela Soprano
Answer: Tracee
Ralph confronted Tracee about how he got her pregnant, and started calling her vile names. She slapped and insulted him, making him angry enough to beat her to death. Tony was infuriated by Ralph's actions. She was killed in the episode "University".
From Quiz: "The Sopranos" Killings - Season 3
Answer: Special K, one of Brendan's henchmen
Hector was accidentally killed when Special K dropped his gun. When the gun went off, it hit Hector and killed him instantly. He was killed in the episode "46 Long".
From Quiz: "The Sopranos" Killings: Season 1
Answer: Hacklebarney State Park
Matthew Bevilacqua and Sean Gismonte, associates in the Soprano family, were looking to move up in the world of organized crime. They felt by killing Christopher they could score points with Richie Aprile, a member of the Soprano crew who was not fond of Christopher. This decision cost both Bevilacqua and Gismonte their lives.
From Quiz: "The Sopranos" Episodes Part II
Answer: The police lost the chain of custody.
After the charges were dropped, a very upset Dr. Melfi had contemplated asking Tony to take care of it his way but then decided not to.
From Quiz: "The Sopranos" Episodes
Answer: Cosette
This show aired November 17, 2002 and featured a strung out Christopher Moltisanti played by Michael Imperioli. He is so out of it that he plops down in the sofa of his apartment, and there is this whimper sound. We find out when his girlfriend comes home looking for her white Maltese, Cosette, that she has been squished by a strung out on heroin Christopher.
From Quiz: Distaff Demises On "The Sopranos"