Thomas Patrick "Tom" Cavanagh (born October 26, 1963) is a Canadian actor. He portrays various iterations of Harrison Wells on The Flash.
- In the shared multiverse, Tom Cavanagh, Matt Letscher and Victor Garber portray Professor Eobard Thawne/Reverse-Flash; Cavanagh portrays Eobard disguised as Harrison Wells throughout the first season of The Flash, Letscher plays the character's original likeness, and Garber briefly plays him disguised as Martin Stein in DC's Legends of Tomorrow. The three actors previously have played roles on Eli Stone; Cavanagh portrayed the title character's father, Letscher played Eli's brother and Garber played his boss.
- He has appeared in every Flash episode but two, "Flashpoint" and "Paradox".