Major Arrowverse star to return in Superman and Lois' final episode

Television hasn't felt the same without the Arrowverse programming to entertain us this year. The CW's shared universe of DC superheroes came to a close in May 2023 when its most popular show The Flash concluded its ninth and final season. Its legacy, however, lived on in Superman and Lois, a show set in the Arrowverse's wider continuity, allowing it to be tied to the franchise without impacting each of its respective shows.

Unfortunately, DC Studios' upcoming Superman movie means that the beloved DC TV show will have to conclude earlier than expected, as Superman and Lois will return to The CW in fall 2024 for its fourth and final season. The good news is that it sounds like it's going to be amazing, suggesting that the Tyler Hoechlin and Elizabeth Tulloch-led series will bow out on a high note.

However, it sounds like there might be another reason to get excited for the final season.

The Flash's Tom Cavanagh to appear in Superman and Lois finale

Tom Cavanagh has revealed that he will be playing a role in the series finale of Superman and Lois. Speaking at a FAN EXPO in Philadelphia, The Flash star explained that he had hoped to direct another episode of the DC TV series before it bowed out, but after that wasn't possible, showrunner Todd Hellbing asked him if he could "play a role" in the episode itself.

Cavanagh is no stranger to directing the show, having been behind the camera for both the season 1 finale and the season 3 premiere - both of which are considered among the show's best episodes. Unfortunately, it wasn't meant to be in season 4, which Cavanagh was understanding about, adding that he was "happy to not do it". But the possibility of appearing in the finale excited him, as he revealed he was also "happy to have done" it.

The Flash star didn't go into detail about who he would be playing in the final episode of the show, but TVLine have since confirmed that he will be making an appearance in it in some capacity. Naturally, DC fans are excited at the prospect of Cavanagh appearing as he is an Arrowverse veteran, and a cameo from him would be one of the show's few major ties to that shared universe of superheroes.

All's Wells that Ends Wells?

Cavanagh played Harrison Wells on the first season of The Flash before it was revealed that he was actually the villainous Reverse-Flash in disguise. The character, whose real name is Eobard Thawne, became the big bad of the first season and continued to remain a thorn in Barry Allen's side until the end of the show's nine-season run, even appearing on DC's Legends of Tomorrow a few times as well (albeit played by Matt Letscher as the original version of the character).

When he wasn't busy playing evil speedsters, Cavanagh was bringing alternate versions of Harrison Wells from across the multiverse to life. In seasons 2 and 4 he played Earth-2's genius Harry Wells, for season 3 he played Earth-19's novelist H.R. Wells, in season 5 he was master detective Sherloque Wells, and in season 6 he was geologist and mythbuster Nash Wells. For his send-off in season 7, he played the original Harrison Wells, who had been revived and was now known as Timeless Wells.

While the Reverse-Flash's knowledge of timelines and the multiverse makes him the most likely of all characters for Cavanagh to reprise in Superman and Lois season 4, one can't help but wonder if he could actually return as Timeless Wells. That character is a being with multiversal knowledge, knowing all about timelines and the lives of the others Wells' in the process. Surely, it would make sense for him to have knowledge of Superman and Lois' Earth. The benevolent character is a bit like Marvel's Watcher, so it wouldn't be completely out-of-the-ordinary for him to make an appearance to watch the events of the show's finale; a final nod to the universe that birthed the show, perhaps?

Then again, maybe he will play a new character. Arrow's David Ramsey reprised his role as John Diggle for two appearances on the show, but he wasn't playing the same version of the character. Could we meet one more Harrison Wells for good measure? One that is unique to Superman and Lois' Earth?

We'll have to wait and see who Cavanagh ends up playing in Superman and Lois season 4. But the idea of one more nod to the Arrowverse as its final remnant bows out feels like a fitting way to close such an iconic chapter in the TV history. We can't wait to see him in action.