What episode does Felicity appear in the Flash?

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Tags

1. #gives
2. #powers
3. #sends
4. #flash
5. #powered
6. #particle
7. #people
8. #barry
9. #explosion
10. #predates
11. #investigation
12. #visits
13. #starling
14. #arrow
15. #season
16. #appearance
17. #felicity
18. #first
19. #eventually
20. #super
21. #episode