The Thinker, played by Neil Sandilands, is a genius inventor who created his own slew of technological weapons to execute his plans.
R’s life and of course, Barry’s self-sacrifice to enter the Speed Force and take over Savitar’s empty spot.
The Thinker is a huge departure from villains like the Reverse Flash, Zoom, and Savitar, who all squared off against Barry thanks in no small part to a comparable power-set.
The most significant from the bunch is the infamous Thinking Cap which gives him formidable mental powers.