Talia's cult was located in a monastery (presumably) in Tibet where Oliver came here due to his suspicion about her connection to his foe Prometheus. When he entered, several students attacked him as intruder, but Talia cut the fight when she demanded to speak with him. Talia revealed to him his identity and that she is in alliance with him.
When Oliver and his team of former enemies released the captives from Adrian's team (except for Digger Harkness who betrayed them) her group of assassins engaged in combat with Oliver's team. While Talia fought with her sister Nyssa al Ghul, some members were killed by Slade Wilson, many are killed with Digger Harkness by Malcolm Merlyn, while others were incapacitated or killed by Team Arrow. With the exception of Talia, all other members of her cult are (presumably) killed when Adrian detonated the explosives across the whole island after his suicide.
However, Talia was revealed to have survived the explosion on Lian Yu; albeit barely, sometime after, she was caught after facing her old adversary in Gotham City and wound up on "Level Two" in Slabside Maximum Security Prison, but after she escaped from Slabside with Oliver's help, it is very likely that Talia has started to rebuild her cult. 
- Talia al Ghul (founder, leader and field agent)
- Unnamed members (presumably decimated)
- Team Arrow
- Nyssa al Ghul
- Malcolm Merlyn/Dark Archer (deceased)
- Slade Wilson/Deathstroke
- Prometheus's team
- Digger Harkness/Captain Boomerang (deceased)