Aidan Quinn (love him ever since "Desperately Seeking Susan") plays Paul and Jared Harris plays John.
It's a talkie film, I'm not even sure if there are any other characters really but their discussions are quite intriguing and at one point I think John makes Paul a cup of dandelion tea. I thought that was so great at the time--I had to go out and try dandelion tea immediately after that.
Paul shows up at the Dakota, John's famous last home. John Lennon: [greeting Paul] "The ghost of Christmas past."
They frolic in Central Park and they go to one of John's favorite restaurants. They contemplate having a reunion of sorts on the tv show "Saturday Night" Live that night because producer Lorne Michaels offers them $3000 to do it but it never happens.
"Two of Us" is a reference to a really great song about the end of a relationship on what's known as the Beatles' break up album "Let It Be." There's a really good Michael Penn/ Aimee Mann cover of this song out their as well (on the "I am Sam" soundtrack).
Personally, I could watch hours of Liverpudlians yucking it up. I love the British slang and I love the accents. And John Lennon could have been the wittiest person ever.
John Lennon: [Answering the Intercom System] Help me, I'm trapped inside this little box.