During interviews, the cast are all at separate locations. Looks like Jerry and Julia are in their homes, Michael is in what looks like a theater, and Jason on a nearly empty stage set.
Jerry is sometimes seen with Larry David, and they speak together on episode commentaries.
Jason, Julia, and Michael are never ever seen together. Yet they provide episode commentary as though they are together. For example, at the start of an episode commentary you might hear, "Hello, this is Michael Richards. To my left is Julia Louis-Dreyfus, and to her left is Jason Alexander."
I am suspicious that they are in fact not in the same room, and they are doing something like a teleconference to put their commentaries together as though they were together, since they are never together during interviews.
Thoughts? Discuss.