Main Characters Athena Grant 103 main appearances Robert "Bobby" Nash 102 main appearances Henrietta "Hen" Wilson 100 main appearances Evan "Buck" Buckley 99 main appearances Howard "Chimney" Han 93 main appearances Edmundo "Eddie" Diaz 86 main appearances Maddie Buckley 80 main appearances May Grant 55 main appearances Harry Grant 43 main appearances Christopher Diaz 40 main appearances Michael Grant 46 main appearances Albert Han 8 main appearances Abigail "Abby" Clark 10 main appearances
Recurring Guest Characters Radiologist 1 guest appearances Dr. Kara Sanford 1 guest appearances Georgia 1 guest appearances Sam Egan 1 guest appearances Rory 1 guest appearances Milo Garner 1 guest appearances Incident Control Commander Janet Reese 1 guest appearances Engineer 1 guest appearances Janell Hansen 1 guest appearances Hector Silva 1 guest appearances Ashley Ryerson 1 guest appearances Keith Willits 1 guest appearances Connor "C.J." Jared 1 guest appearances Vanessa Hubbard 1 guest appearances Tracy Dawson 1 guest appearances Zeke Millstein 1 guest appearances Steve Hansen 1 guest appearances Dylan 1 guest appearances Caleb 1 guest appearances Katie 1 guest appearances ⇤ « 35 36 37 38 39 40 41 42 43 44 » ⇥