I am the Voice of Signor in “Years and Years” and on episodes one and two my surname was misspelled. Episodes three to six were corrected to read the correct “McCready”. How can I correct the spelling in the IMDb cast credit?
For the page with the misspelled name, you will want to merge that page to your correctly spelled name page, this is done through a Name Merge Correction, as MAthePA described above, you will need to make sure that you do check the box within your name merge submission form marked "update existing credits with 'as' attribute".
Once all your credits have been merged to your correctly spelled name page, you will need to submit the episode credit corrections for the episodes where you were not credited with the misspelled name, and request to remove the 'aka' name attribute from those credits.
Let us know if you have questions or need any help!