[1] The term is represented by the triquetra symbol, which is placed on the cover of the sisters' Book of Shadows in both shows.

In the reboot series, a new "Power of Three" is formed by the Vera/Vaughn sisters Macy (Madeleine Mantock), Mel (Melonie Diaz), and Maggie (Sarah Jeffery).

[2] The "Power of Three" originally included Prue (Shannen Doherty), Piper (Holly Marie Combs), and Phoebe Halliwell (Alyssa Milano).

[2][6] This is made possible after it is revealed that she is the daughter of the Halliwell sisters' mother Patty (Finola Hughes) and her Whitelighter Sam Wilder (Scott Jaeck).

Paige's magical abilities represent her dual heritage as both a witch and whitelighter; like Prue, she possesses a form of telekinesis, but she has to verbally call for objects to orb ("teleport") them to their intended destination.

In another occurrence, Penny, Patty (who was pregnant with Phoebe at the time), and Piper use the "Power of Three" to banish the Hollow in the final episode "Forever Charmed".

[8] In the reboot series of Charmed (2018–2022), a new "Power of Three" is formed by sisters Macy (Madeleine Mantock), Mel (Melonie Diaz) and Maggie Vera (Sarah Jeffery).