Doctor Who: Check out some photos from upcoming episodes (plus, the fez returns)

Doctor Who will premiere the second half of its seventh series on March 30, and after months of waiting, fans are anxious to see the series return. The Christmas special, "The Snowmen," saw the (re)introduction of mysterious new companion Clara (Jenna-Louise Coleman), who will accompany the Doctor (Matt Smith) throughout his adventures for the rest of series 7 -- and beyond, hopefully. 

For fans who just can't wait to see the new episodes, the BBC has released some promotional photos from the Doctor's next few outings. We've provided them for you below, divided up by episode: 

Episode 7.06: "The Bells of St John"

The official synopsis of this episode reads: "Earth, 2013. A whole world swimming in Wi-Fi. A Wi-Fi soup! Suppose something got inside it. Suppose there was something living in the Wi-Fi, harvesting human minds. Something that loves and cares for humanity so much it can’t get enough of it…"

Episode 7.07: "The Rings of Akhaten"

We don't know much about this episode except that it features Egypt in some way. Here's hoping it marks the return of Nefertiti, who we last saw in the second episode of the seventh series, "Dinosaurs on a Spaceship." 

Episode 7.08: "The Cold War"

This episode, penned by Mark Gatiss, takes place on a submarine and will feature the return on the classic villains the Ice Warriors. 

Episode 7.09: "Phantoms of the Hex" or "The Hiders in the House"

The title on this Neil Cross-penned ghost story isn't confirmed, but what is confirmed is that it will, in some way, involve ghosts. Count us in. 

Doctor Who will return on March 30 with "The Bells of St John" on BBC One in the UK and BBC America in the US.