I'm not entirely sure as I haven't watched it recently. But generally, it might involve the characters in the 'Barney Miller' world during Christmas time, perhaps dealing with some comical or heart - warming situations in the precinct.
I'm not entirely sure without more specific information, but I assume Barney Miller is one of the main characters. And probably other regulars from the 'Barney Miller' series like his colleagues in the precinct.
The main plot likely revolves around the characters in the 'Barney Miller' series during Christmas time. It might involve their interactions, the solving of crimes or problems in the precinct while also dealing with the Christmas spirit and all the chaos or cheer that comes with the holiday.
In 'Barney Miller: The Christmas Story', Barney Miller himself is a central figure. His team members, such as the other detectives and officers in the precinct, are also likely to be main characters. They would be involved in the various events that take place during the Christmas - themed story. Maybe there are some recurring characters from the overall series that play important roles in this particular Christmas story as well.
Henry Miller was a well - known writer, while 'A Christmas Story' is a popular movie. The actors in the movie are mainly associated with the film industry. Without more specific details, it's difficult to establish a link between Henry Miller and the actor in this movie. For example, if we consider the main actor in 'A Christmas Story' like Peter Billingsley, his work is mainly in acting in this family - oriented Christmas movie, which is quite different from Miller's domain as a writer.
Since Henry Miller was a writer with his own unique perspective, it's hard to say for sure. But he might be interested in the actor's ability to tell a story through acting, which is also a form of narrative like writing.
Their friends like Marshall and Lily could be important characters. Marshall might offer legal advice about the adoption process as he's a lawyer. Lily could be the one who gives them tips on taking care of a baby since she has experience with her own child.