They invite Tag to Central Perk when it turns out that Tag already had his sweater. He works as Rachel's replacement at Ralph Lauren during her maternity leave.Tag tells Rachel he wants to get back together but when she reveals to be pregnant he takes it back and leaves. When Rachel returns to work, she fears that Gavin is trying to take over her job.
The two finally date, but break up after Rachel hastily proposes to Joshua after 4 dates in "The One With All The Wedding Dresses".
Rachel bizarrely does not see the multiple similarities between Ross and Russ, and even more bizarrely, neither do either of them.
Rachel dates Russ as a rebound relationship after breaking up with Ross upon learning of a list of her pros and cons he had written up whilst trying to decide whether to date her or Julie, but the fact that she would date a man who resembles him so much - even if she hasn't noticed the aforementioned resemblances - seems to strongly imply that she is still attracted to him, and the other friends actually suggest this theory to her.
Barry and Mindy get divorced in season six when Barry cheats on Mindy again. A dark, Italian man who could not speak English very well.
Rachel's relationship with Paolo was based merely on sex.