In the scene at the end after Capt. Binghamton arrives, when everyone is standing around the captured Japanese radio, in the medium shots Virgil is standing to the right of the screen (to Gruber's left) almost out of range of the cameras. Then the scene switches to a longer shot and Virgil is suddenly standing to Gruber's right, between Gruber and Happy.
The creators apparently had no more luck working with the (uncredited) little girl who plays Christy's daughter in this episode than the characters did in the story; when she's supposed to have finally said "Da-Da" at the end, her mouth doesn't move as if she were really talking. And for the rest of the episode, all of the words that she supposedly says are only heard over the radio, never shown.