Aikido has recently been seen lurking in The Walking Dead. It is prominent in season 6 episode 4 with the episode focusing on a survivor who tries to follow a non-violent path. There are several scenes where he is shown practising staff techniques. However, to me, it looks like the staff kata come Kobudo (the weapons side of Karate) rather than Aikido.
Snippets from the episode can be seen here:
Watch them now before the clip is taken down!