Well the title is self explanatory no? This happened in 2015 and 2019 on Critical Role Thursdays.

From critical role:

Campaign 1 Episode 34 - Race to the Ziggurat
Campaign 2 Episode 88 - Unwanted reunions

Also congrats to Laura for FINALLY winning the the best performer award a couple of days ago for her role as Abby in the last of us Part 2