Fics like “Doppelganger”

The Serpent's Vow by Rahar_Moonfire (Stargate SG-1, Yu-Gi-Oh!)

I Still Say it Looks like a Nail by Narsil, dogbertcarroll (Buffy the Vampire Slayer (TV), Stargate SG-1)

Under the Ice by Goddess47 (Stargate Atlantis, Stargate SG-1)

Through Seas of Stars by AidaHwedo (Critical Role (Web Series), Stargate SG-1)

Trust Issues by ChokolatteJedi (NCIS, Stargate SG-1, more)

Perspicacity has its Disadvantages by NinthFeather (Mahou Shoujo Madoka Magika | Puella Magi Madoka Magica, Stargate SG-1)

Some Days You Need A Friend by TextheTallOne (NCIS (TV 2003), Stargate SG-1, more)

X Marks the Spot by MacBeth (Stargate SG-1, MacGyver (TV))

Complicating Factors by ChokolatteJedi (NCIS, Stargate SG-1)

O'Neill² by Project7723 (Stargate SG-1)

A Winding Road by halestrom (Stargate SG-1, Stargate Atlantis)

All Her Colors by MissAnnThropic (Stargate SG-1)

always a child by elumish (Teen Wolf (TV), Stargate SG-1)

The Dragon-King's Temple by Kryal (Stargate SG-1, Avatar: The Last Airbender)

Waking to Another Sky by Vathara (Sword Art Online, Stargate SG-1)

Space Wizards: Dawn of the D.S.F. by Yoden (Harry Potter - J. K. Rowling, Stargate SG-1, more)

A Matter of Preference by madeitsimple (Stargate SG-1)

Familiar Strangers by maychorian (Star Wars - All Media Types, Star Wars Legends: Jedi Apprentice Series - Jude Watson & Dave Wolverton, more)

The Day Tony 'Bombed' NCIS by Bellaromanza (NCIS, NCIS: Los Angeles, more)

Fics like Doppelganger