Question: Why was Chip framing Dinozzo for the murder of the unidentified woman?
Answer: Because Chip made a lab error in a previous job, and Abby and Dinozzo were instrumental in revealing/correcting the mistake which got Chip fired. Hence the grudge against Dinozzo and Abby. So, he framed Dinozzo for a murder and attempted to kill Abby at the end of the show.
Question: I don't know the episode, but didn't Mike Franks have a son who died, and the woman who was in the cab was holding a blonde baby boy? After that Mike Franks just had a daughter in law and a granddaughter.
Answer: Season 4, Episode 8. "Iceman" is where Mike Frank's son Corporal O'Neill is introduced.
Question: I finally saw the 2-part episode from the show JAG. Does anyone know what happened to Viv Blackadder? I don't recall hearing anyone ever mention the name on NCIS.
Answer: I dont believe it is ever mentioned, but like most pilot episodes the characters are often changed, replaced or even removed in this case.