William MacDonald in 'Toronto Mississippi'

William MacDonald as Felix Featherhead Riverdale Season 7

Christina Chang and William MacDonald in The Good Doctor (2017)

William MacDonald in The Good Doctor (2017)

Christina Chang, William MacDonald, and Andrea Ware in The Good Doctor (2017)

Christina Chang, William MacDonald, Fiona Gubelmann, and Andrea Ware in The Good Doctor (2017)

Christina Chang, Freddie Highmore, William MacDonald, and Fiona Gubelmann in The Good Doctor (2017)

Freddie Highmore, William MacDonald, and Andrea Ware in The Good Doctor (2017)

Freddie Highmore and William MacDonald in The Good Doctor (2017)

Gillian Anderson, David Duchovny, and William MacDonald in The X-Files (1993)

William MacDonald in White Cloud, Blue Mountain (1997)

William MacDonald in The Night Agent (2023)