Both dramas have the premise of someone going ‘undercover’ to solve an old case, and with false identities involved. In You’re all Surrounded it’s more planned to happen while in Doubtful Victory it’s more by accident, but both MCs are personally involved in the old case and solving it is/becomes their goal.

Both dramas also have a female lead that knows the male lead from when they were children, and suspects his identity. There’s more romance in You’re all Surrounded, though.