Prior to her death on Tuesday, Carrie Fisher had been in London just days before suffering a heart attack on a flight from the U.K. to Los Angeles on Dec. 23. Fisher was across the pond filming the third season of the half-hour British-American comedy, Catastrophe, which stars Sharon Horgan and Rob Delaney as a newly married couple raising a toddler. Fisher played Delaney?s TV mother, Mia, and first appeared in the show?s second episode in 2015. The cast of the show is heart broken over the loss of Fisher.