The Aronov Time Cone passing through an abrupt gravity gradient creates an unusual situation: quantum entanglement draws an earlier version of Kelly into the present.
"We're going to have tiresome split screen effects, just like we've seen on other shows!", you moan.
Except for the fact that Adrianne Palicki is such a good actress that from the moment Kelly-2 came on screen, I was saying to myself -- that's who? Is that Kelly? It kind of looks like her, is it her? It wasn't until the two versions were on screen together that I accepted her as Kelly.
Other than the visual cues as to who was who, Kelly-2 always looked younger, she seemed lighter, she was definitely more fun.
And then there's Ed. Poor emotionally crippled Ed. Poor relationship roadkill Ed. Is there a second chance for Kelly and Ed? He wants to, she wants to and it looks like it could happen when an incoming plot complication shows up on ship's sensors before insertion can be accomplished.
Decisions have to be made about Kelly-2 and they arrive at a plan. Will it solve their glass-crunching problem?