A new set of Doctor Who sketches - 9th doctor, Captain Jack, Oswin/Clara. I need one more person to do but I don’t know who. Suggestions would be greatly appreciated! (I'm thinking maybe 4th doctor?)

Psst, I’ve already done 10, Rose, Martha, Donna (https://www.weasyl.com/submission/59936) & 11, Amy, Rory, River (https://www.weasyl.com/submission/59938).