Nemesis is the name of two fictional characters in the DC Comics universe. Thomas Andrew Tresser first appeared in The Brave and the Bold #166 and was created by Cary Burkett and Dan Spiegle. Soseh Mykros first appeared in JSA Annual #1 and was created by David S. Goyer and Uriel Caton.

The Brave and the Bold is a comic book series published by DC Comics as an ongoing series from 1955 to 1983. It was followed by a reprint miniseries in 1988, two original miniseries in 1991 and 1999, and was revived as an ongoing anthology title in 2007 and 2023. The focus of the series has varied over time, but it most commonly features team-ups of characters from across the DC Universe.