[quote=Cayden Black]
Does anyone know if the Tolan race ever returned? I believe they were all wiped out but I may be mistaken...There were the people from Dr. Quinn's planet. I can't remember their dam name though...
[/quote]
Tollan never returned.

Dr.Quinn, the Langarians wouldn't send anyone aboard. Never in a month of sundays, especially with the incident with how the Destiny Crew and the folk from the SGC took over the gate facility in a bid to dial the gate.