"Doctor Who" finally returned this weekend and The Doctor was armed with an antigrav motorbike, the trusty sonic screwdriver and a brand new companion, Clara Oswald, hopefully in her final incarnation.
While Clara may be The Doctor's wittiest, fastest-talking companion yet, The Huffington Post thought she could use a crash course in travelling with the Eleventh Doctor.
Above, check out 11 "rules" for "Doctor Who" companions to keep in mind when embarking on an unprecedented adventure through space and time.
"Doctor Who" airs Saturdays at 8 p.m. ET on BBC America.
Video by Irina Dvalidze