Artist John Picacio is calling on Doctor Who fans to answer a club organizer’s appeal for medical funds:

Doctor Who fans: My friend Crystal D. Shedrock has cancer. She is one of the hardest-working Whovians that I know — a single, working mom w/ three kids, who has built an amazing Doctor Who fan club, from the ground up. She needs a financial boost so that she can beat cancer and be there for her kids.

As of this writing her GoFundMe appeal has raised $3,880 of the $21,000 required.