Below are some photos that might help.
![overlap_002](http://knittingpureandsimple.com/wp-content/uploads/2011/07/overlap_002-300x225.jpg)
Here are the last 4 stitches of the row placed on a doublepoint needle and overlaped behind the first 4 of the row.
![overlap_004](http://knittingpureandsimple.com/wp-content/uploads/2011/07/overlap_004.jpg)
This photo shows knitting a stitch from the front needle together with a stitch from the back needle.
![overlap_008](http://knittingpureandsimple.com/wp-content/uploads/2011/07/overlap_008-300x225.jpg)
This photo shows the 4 stitches knitted together, thus joining the work into a round.