In February 2022, Laura-Jayne Tyler of Inside Soap reported that Smith would be reprising his role to play a part in the show's finale, and that he had already started filming. A week later, Smith's co-star Alan Fletcher confirmed Harold's return, as he spoke about show's final episodes on This Morning. On 7 May, Smith spoke about reprising his role for the final episodes airing later that year, saying: "It's an absolute pleasure to be back. I'm the biggest sook under the sun. I'm going to be shocking on the last night that Neighbours airs. It really will be an end of an era and I am so proud to have been a part of it." Harold returned on 18 July in Australia and on 6 July in the UK. He makes a "surprise arrival" in Erinsborough, where he befriends Zara Selwyn (Freya Van Dyke) who shares his concerns about her mother Amy Greenwood (Jacinta Stapleton), and Toadie and Melanie Pearson's (Lucinda Cowden) engagement. Harold also helps counsel a grieving Mackenzie Hargreaves (Georgie Stone) by opening up about his own experiences with grief.
In February 2022, Laura-Jayne Tyler of Inside Soap reported that Smith would be reprising his role to play a part in the show's finale, and that he had already started filming. A week later, Smith's co-star Alan Fletcher confirmed Harold's return, as he spoke about show's final episodes on This Morning. On 7 May, Smith spoke about reprising his role for the final episodes airing later that year, saying: "It's an absolute pleasure to be back. I'm the biggest sook under the sun. I'm going to be shocking on the last night that Neighbours airs. It really will be an end of an era and I am so proud to have been a part of it." Harold returned on 18 July in Australia and on 6 July in the UK. He makes a "surprise arrival" in Erinsborough, where he befriends Zara Selwyn (Freya Van Dyke) who shares his concerns about her mother Amy Greenwood (Jacinta Stapleton), and Toadie and Melanie Pearson's (Lucinda Cowden) engagement. Harold also helps counsel a grieving Mackenzie Hargreaves (Georgie Stone) by opening up about his own experiences with grief.