NSBitmapImageRep *aRep = [NSBitmapImageRep imageRepWithData:[toCopy TIFFRepresentation]];
NSFileWrapper *wrapper = [[NSFileWrapper alloc] initRegularFileWithContents:[aRep representationUsingType:NSPNGFileType properties:NULL]];
[wrapper setPreferredFilename:[[NSString stringWithFormat:@"%02d-%d", [[thisMatrix selectedCell] tag], [episodeTable selectedRow]] stringByAppendingPathExtension:@"png"]];
[pb writeFileWrapper:wrapper];