You have a table of Stages and one of Performers and a junction table.
tblPerformers
PerformerID (PK and autonumber)
LastName
FirstName
...other fields...
tblStages
StageID (PK and autonumber)
StageName
...other fields...
tblPerformersAndStages
PerformerAndStagesID (PK and autonumber)
PerformerID (FK)
StageID (FK)
PerformanceTime
PerformanceDate
Something along those lines...
If I have not suggested this yet then you might want to look at this
article. There is also another one there by NoahP that is worth a look...
hth,
Jack