Price is currently unknown. The price given above is a total guess, based upon a reasonable extrapolation from the price of individual issues of TV Comic in this era. Because the database doesn't allow the entry of an issue without setting a price, a guess was required just to get this issue listed.
Notes: This story is a prime example of how the TV Comic Annuals didn't observe continuity established by TV Comic. Here, the Doctor is inexplicably shown to be friendly with the Trodsódespite the fact that in TV Comic, the Trods were depicted as bitter rivals.