Mel picks up Maggie from a military-themed party and later Maggie is kidnapped and brought to a party to celebrate her acceptance into Kappa in pilot episode. Maggie visits Parker at his frat house and finds him injecting himself with some sort of drug in his room in episode 1x07 "Out of Scythe".
Mel is hanging up posters for the protest when she is greeted by Harry Greenwood, the new head of the department who is replacing her mother in pilot episode. Macy meets with Harry to interrogate him with the truth serum but realizes too late that it isn't working in episode 1x02 "Let This Mother Out".
Mel helps organize a protest of Professor Thaine outside the building where his lab is located in pilot episode. Mel and Maggie are given a vision of 1989 to learn what happened to cause Brenda to become a ghost and they spot their mother who is pregnant with Macy in episode 1x06 "Kappa Spirit".
Marisol is spending the night alone while Maggie and Mel are out when a strange force comes to the house in pilot episode. The sisters debate what to do about the presence in the Ouija board while avoiding summoning Harry who they are not sure they can trust in episode 1x02 "Let This Mother Out". Maggie goes overboard with her new glamour spell in hosting the halloween party for her sorority in episode 1x03 "Sweet Tooth".
Maggie and Mel head off for a night on the town while their mother stays home. Later, Macy is walking down the street with Galvin when she spies a house she seems to remember in pilot episode. Mel comes home and runs into Maggie outside who reveals her conversations with the Ouija board in episode 1x02 "Let This Mother Out". Maggie talks to Mel on the phone while walking home and later Mel runs into Macy on the porch in episode 1x03 "Sweet Tooth".
Mel is putting up posters for her rally when Cam shows up and tells her she can't do that in pilot episode. Angela Wu follows Macy across campus but is interrupted by Mel who asks to talk in private in episode 1x03 "Sweet Tooth".
Nico calls Mel about meeting for lunch and later Mel tries to get Nico out of the building while she is under the influence of the truth serum in episode 1x02 "Let This Mother Out".
Maggie finds Brian at his work and tells him that she only wishes to be friends in the future in episode 1x02 "Let This Mother Out".
The sisters take Angela Wu to the building where the homecoming floats are stored to perform the exorcism and Maggie is forced to distract Parker who has stopped by to drop off some fireworks in episode 1x04 "Exorcise Your Demons".
Nico talks to the shapeshifter posing as an FBI agent and then heads off with Mel in episode 1x05 "Other Women".
Mel accompanies Nico to Trip's grave and Nico tells her that she doesn't believe the narrative of him being a killer in episode 1x05 "Other Women".
Nico finds evidence in Trip's fishing cabin but before she can leave the shapeshifter posing as Trip attacks her, steals the evidence, and lights the cabin on fire with her inside. The cabin was added for filming. in episode 1x05 "Other Women".
Source: Ely_Sky — Twitter
Lucy lights a strange looking candle to help her meditate and accidentally releases the ghost of a former Kappa sister in episode 1x06 "Kappa Spirit".
Maggie and Mel talk to the Kappa who kicked out Brenda and learn the truth about who she was and how she died in episode 1x06 "Kappa Spirit".