It shouldn’t come as a surprise that there are a few references to Doctor Who snuck into Amazon Prime’s Good Omens. Both Terry Pratchett and Neil Gaiman, who wrote the novel the series is based on, counted themselves as fans of the long-running British sci-fi series. Gaiman even wrote two episodes of Doctor Who, “The Doctor’s Wife” and “Nightmare in Silver.”

And, of course, there’s David Tennant as the demon Crowley. Tennant played the 10th incarnation of the Doctor from 2005 to 2010.

While we never get to see an alien “that looked like a pepper pot” — a reference from the novel to the Doctor Who villain, the Daleks — there are still a few nods to Doctor Who scattered throughout the series.

SID RAT

The first reference to the Whoniverse comes from a brief glimpse of a license plate early in the premiere episode. When the Youngs arrive at St. Beryl’s, we see that the family car’s number plate reads “SID RAT” — or TARDIS spelled backwards. (SIDRATs also appear in Doctor Who mythology as the evil version of the TARDIS used by the War Lords.)

Newt’s tie, the Fourth Doctor’s scarf

In the second episode, we meet future Witchfinder Private Newton Pulsifer. The tie he’s wearing to his disastrous first day at his new job mimics Tom Baker’s iconic scarf from his tenure as the Fourth Doctor (the best Doctor — don’t @ me).

Exterminate!

Right at the beginning of episode 4, one of the Them shouts “Exterminate!” while discussing what aliens would have to say if they visited Earth. The line is a reference to the Daleks’ favorite pastime.

Crowley (David Tennant) on Gallifrey

Later in episode 4, the demon Crowley pulls out his Extremely Big Book of Astronomy and looks for a planet on which to ride out the apocalypse. One of his options is the Doctor’s homeworld of Gallifrey.