He originally foresaw people's deaths in dreams in which the person appeared approximately ten days before their death. Around 2014 (possibly as early as late 2013), he started seeing the tendrils while awake as well.
He has been described as "tall, black and careworn, deep lines of worry etched into an otherwise handsome face" (MAG 42).
Oliver had a boyfriend named Graham (possibly Graham Folger) starting in 2000 or 2001, dating for six years, eventually living together, and subsequently breaking up prior to 2007. He moved to London around 2005 to do his undergraduate degree at the London School of Economics, and started working at Barclays directly after graduating. However, the stress and problems in his personal life drove him to a nervous breakdown after barely a year, and led to a "rather dramatic" departure from his job in around 2007. He started having prophetic dreams of people's death soon after.
By 2015, Oliver was working in a "magic" shop selling crystals and tarot cards.
In Autumn 2013, Jennifer Ling saw Oliver staring at her from the doorway of a small shop in Soho whose sign read "Crystals. Books. Tarot". He then walked up to her and asked what she was listening to though she was not wearing headphones. When she told him so, he muttered something about her needing to protect her hearing and walked back into the shop. It's likely he saw the black tendrils coming from her ears. (MAG 42)
Statement Regarding Gertrude's Predicted Death (March 2015)
Unnamed Research Vessel (Mid-2015 to 2018)
In MAG 121: Far Away, Oliver assumed the identity of a chemist and boarded an unnamed research vessel in the hopes of getting some restful sleep. Near the end of the trip, he noticed black vines curling around himself and everyone else on the vessel. He used a gun to kill the captain and then forces the crew to go to a specified spot, at which point a falling satellite crashed into them at 200mph, killing them all instantly.
Second Statement (February 2018)
In MAG 121: Far Away, Oliver gives his statement to a comatose Jon regarding his death on the unnamed research vessel. He claims that The Web has sent him. He encourages Jon to choose whether to live or die.
Georgie encounters him as he is leaving. He calls himself Antonio Blake again, and Georgie is extremely curt with him, recognizing him as an avatar of The End and claiming he "reminds her of someone" who was "evil."
Oliver Banks has appeared in the following episodes. Bold marks episodes where he has given a statement.