In its 13th season,Supernaturalstill manages to deliver new twists alternate worlds are a thing!

and keep things fun.

(Did we mention the upcomingScooby-Doocrossover?)

The Scorpion and the Frog

Credit: Jack Rowand/The CW

Thats precisely why the fantasy drama has earned theNo.

1 spot on EWs Must List.

Theyll add new spices and mix it up, but they dont try and reinvent the wheel.

The addition of Alexander [Calvert] this year has just been phenomenal.

By then I feel like Ive got a good gauge of tone and where were headed that season.

Thats also when I get a sense of, Okay cool, this is gonna work.

Whats been your favorite episode of season 13?PADALECKI:I loved Tombstone and Lost and Found.

I always love our season premieres.

Everyones been waiting, including the actors, to find out whats happening.

Theres an almost tangible buzz on set we can almost feel the eyes of the fans on us.

And Scoobynatural, obviously.ACKLES:The Scoobynatural episode [which airs March 29] was such a unique experience.

Ive got to go with Scooby.

We went off in so many different directions.

There was a lot of good television that was made because we hadnt yet made the rules.

Supernaturalairs Thursdays at 8 p.m.

ET on The CW.