You can totally tell that the first two shots featuring Mike, Marcia, and Peter and Carol, Jan, and Greg looking for Bobby and Cindy, and the shots used in the end, are just the same shots mirrored.
If the boys needed to rig a special battery hookup to the old phone they were using, why wouldn't the one Cindy answered have needed a new battery too? Each phone would be as old as the other!
(Greg tries using a phone he's found, and Cindy answers the call from another part of town)
Greg: Help us! Help us! We're stranded out here in the desert in a ghost town!
Cindy: That's funny. So are we.
This episode continues of from the previous episode with a different title.
Alice says to the family: "I'll look like Tonto". Alice was talking about The Lone Ranger's sidekick Tonto.