Time Warp
I've been watching season 1 of The Professionals on DVD. These episodes originally aired in 1977-78 in the UK, so I've been stunned by how many guest stars I've recognized, including Jeremy Bulloch (the original Boba Fett and Edward of Wickham from Robin of Sherwood), David Suchet (Hercule Poirot from Poirot), Patricia Quinn (Magenta from The Rocky Horror Picture Show), and Lalla Ward (Romana II from classic Doctor Who). For most of these people, it's the first time I've seen them in another role.