Before you watch the new "Doctor Who" episode titled "The Bells of Saint John," BBC has a prequel for you.

In "The Bells of Saint John" prequel written by series showrunner Steven Moffat, the Doctor is still searching for Clara, the new companion he met in the Christmas special. However, it's not going very well and the despondent Doctor takes a break on Earth. While there, he chats with a young girl about destiny and his search for Clara. His lost friend might be closer than he thinks.

Fans shouldn't fret, because the Doctor will succeed -- eventually -- and reunite with Clara for a new series of "Doctor Who" adventures beginning Saturday, March 30 at 8 p.m. ET on BBC America with "The Bells of Saint John."

Watch the prequel below.

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