To commemorate the 5th anniversary of Dave retiring from late night television (his last show was on May 20, 2015), I've put together a series of "first and last" appearances, the latter paying tributes in their own ways to the last giant of late night (h/t Jason Zinoman).
Part 22. Ray Romano
1. May 23, 1995
2. May 8, 2015
The 2015 guest appearance comes from Andrew Lynch's superb YouTube upload, linked here:    • Video  
Note: The "first appearance" card at the end gives Ray's debut appearance as "March 23, 1995." It was actually two months later on May 23.