A savy time traveler has good long distance coverage ^^
The inspiration for this card comes from the Doctor always upgrading his companions' mobile phones into "superphones" that can make calls across light years and centuries.
The dates used are from the following stories:
1215 - The King's Demons
1599 - The Shakespeare Code
2540 - Frontier In Space
4126 - Planet Of The Ood
The image is taken from Blink.