With the 'Law & Order: Criminal Intent' episode entitled "The Last Street In Manhattan", NBC (as the parent company) missed out on a great chance for a two-part crossover on USA Network.
In "The Last Street In Manhattan", Sean was a bar owner in Inwood (just north of Toobworld Central), and when his daughter Vanessa thought he had been killed by a neighborhood mobster, she finally told the truth about how that thug killed her former boyfriend. Afterwards, she was reunited with her father who was very much alive.
That's where the episode ended. But the story of Sean and Vanessa should have continued - straight into the show that follows 'Law & Order: Criminal Intent' on USA Network: 'In Plain Sight'.
In order to protect Vanessa from harm before she had a chance to testify against the mobster - and afterwards as well - she and her father should be put into the Witness Protection Program with new identities.
And that would mean we'd get to see U.S. Marshals Mary Shannon and Marshall Mann interact with Detectives Bobby Goren and Alexandra Eames as the transfer of the two took place. Then we could see Sean and Vanessa's story continue in Albuquerque, New Mexico.
'Law & Order: Criminal Intent' and 'In Plain Sight' are already connected, so it's not like this would have been an impossible dream. Mary Shannon showed up in New York to take custody of a witness and she met with Captain Danny Ross and Detectives Mike Logan and Megan Wheeler.
Oh well. Maybe next time.....
But at some point, we may see actor Jack McGee (who played Sean) in a guest spot on some other show. Since he's such a good character actor, that's probably a given. And if we don't learn that much about his character - and so long as he's in some other location than New York City, we might be able to make the claim that he's actually Sean in his new identity.